interface/wx/datetime.h

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        datetime.h
   3 // Purpose:     interface of wxDateTime
   4 // Author:      wxWidgets team
   5 // RCS-ID:      $Id$
   6 // Licence:     wxWindows licence
   7 /////////////////////////////////////////////////////////////////////////////
   8
   9 /**
  10     @class wxDateTime
  11
  12     wxDateTime class represents an absolute moment in time.
  13
  14     The type @c wxDateTime_t is typedefed as <tt>unsigned short</tt> and is
  15     used to contain the number of years, hours, minutes, seconds and
  16     milliseconds.
  17
  18     Global constant ::wxDefaultDateTime and synonym for it ::wxInvalidDateTime are
  19     defined. This constant will be different from any valid wxDateTime object.
  20
  21
  22     @section datetime_static Static Functions
  23
  24     All static functions either set or return the static variables of
  25     wxDateSpan (the country), return the current moment, year, month or number
  26     of days in it, or do some general calendar-related actions.
  27
  28     Please note that although several function accept an extra Calendar
  29     parameter, it is currently ignored as only the Gregorian calendar is
  30     supported. Future versions will support other calendars.
  31
  32     @beginWxPythonOnly
  33     These methods are standalone functions named
  34     "wxDateTime_<StaticMethodName>" in wxPython.
  35     @endWxPythonOnly
  36
  37
  38     @section datetime_formatting Date Formatting and Parsing
  39
  40     The date formatting and parsing functions convert wxDateTime objects to and
  41     from text. The conversions to text are mostly trivial: you can either do it
  42     using the default date and time representations for the current locale
  43     (FormatDate() and FormatTime()), using the international standard
  44     representation defined by ISO 8601 (FormatISODate(), FormatISOTime() and
  45     FormatISOCombined()) or by specifying any format at all and using Format()
  46     directly.
  47
  48     The conversions from text are more interesting, as there are much more
  49     possibilities to care about. The simplest cases can be taken care of with
  50     ParseFormat() which can parse any date in the given (rigid) format.
  51     ParseRfc822Date() is another function for parsing dates in predefined
  52     format -- the one of RFC 822 which (still...) defines the format of email
  53     messages on the Internet. This format cannot be described with
  54     @c strptime(3)-like format strings used by Format(), hence the need for a
  55     separate function.
  56
  57     But the most interesting functions are ParseTime(), ParseDate() and
  58     ParseDateTime(). They try to parse the date and time (or only one of them)
  59     in 'free' format, i.e. allow them to be specified in any of possible ways.
  60     These functions will usually be used to parse the (interactive) user input
  61     which is not bound to be in any predefined format. As an example,
  62     ParseDate() can parse the strings such as "tomorrow", "March first" and
  63     even "next Sunday".
  64
  65     Finally notice that each of the parsing functions is available in several
  66     overloads: if the input string is a narrow (@c char *) string, then a
  67     narrow pointer is returned. If the input string is a wide string, a wide
  68     char pointer is returned. Finally, if the input parameter is a wxString, a
  69     narrow char pointer is also returned for backwards compatibility but there
  70     is also an additional argument of wxString::const_iterator type in which,
  71     if it is not @NULL, an iterator pointing to the end of the scanned string
  72     part is returned.
  73
  74
  75     @library{wxbase}
  76     @category{data}
  77
  78     @stdobjects
  79     - ::wxDefaultDateTime
  80
  81     @see @ref overview_datetime, wxTimeSpan, wxDateSpan, wxCalendarCtrl
  82 */
  83 class wxDateTime
  84 {
  85 public:
  86     /**
  87         A small unsigned integer type for storing things like minutes,
  88         seconds &c. It should be at least short (i.e. not char) to contain
  89         the number of milliseconds - it may also be 'int' because there is
  90         no size penalty associated with it in our code, we don't store any
  91         data in this format.
  92     */
  93     typedef unsigned short wxDateTime_t;
  94
  95
  96     /**
  97         Time zone symbolic names.
  98     */
  99     enum TZ
 100     {
 101         /// the time in the current time zone
 102         Local,
 103
 104         //@{
 105         /// zones from GMT (= Greenwich Mean Time): they're guaranteed to be
 106         /// consequent numbers, so writing something like `GMT0 + offset' is
 107         /// safe if abs(offset) <= 12
 108
 109         // underscore stands for minus
 110         GMT_12, GMT_11, GMT_10, GMT_9, GMT_8, GMT_7,
 111         GMT_6, GMT_5, GMT_4, GMT_3, GMT_2, GMT_1,
 112         GMT0,
 113         GMT1, GMT2, GMT3, GMT4, GMT5, GMT6,
 114         GMT7, GMT8, GMT9, GMT10, GMT11, GMT12, GMT13,
 115         // Note that GMT12 and GMT_12 are not the same: there is a difference
 116         // of exactly one day between them
 117         //@}
 118
 119         // some symbolic names for TZ
 120
 121         // Europe
 122         WET = GMT0,         //!< Western Europe Time
 123         WEST = GMT1,        //!< Western Europe Summer Time
 124         CET = GMT1,         //!< Central Europe Time
 125         CEST = GMT2,        //!< Central Europe Summer Time
 126         EET = GMT2,         //!< Eastern Europe Time
 127         EEST = GMT3,        //!< Eastern Europe Summer Time
 128         MSK = GMT3,         //!< Moscow Time
 129         MSD = GMT4,         //!< Moscow Summer Time
 130
 131         // US and Canada
 132         AST = GMT_4,        //!< Atlantic Standard Time
 133         ADT = GMT_3,        //!< Atlantic Daylight Time
 134         EST = GMT_5,        //!< Eastern Standard Time
 135         EDT = GMT_4,        //!< Eastern Daylight Saving Time
 136         CST = GMT_6,        //!< Central Standard Time
 137         CDT = GMT_5,        //!< Central Daylight Saving Time
 138         MST = GMT_7,        //!< Mountain Standard Time
 139         MDT = GMT_6,        //!< Mountain Daylight Saving Time
 140         PST = GMT_8,        //!< Pacific Standard Time
 141         PDT = GMT_7,        //!< Pacific Daylight Saving Time
 142         HST = GMT_10,       //!< Hawaiian Standard Time
 143         AKST = GMT_9,       //!< Alaska Standard Time
 144         AKDT = GMT_8,       //!< Alaska Daylight Saving Time
 145
 146         // Australia
 147
 148         A_WST = GMT8,       //!< Western Standard Time
 149         A_CST = GMT13 + 1,  //!< Central Standard Time (+9.5)
 150         A_EST = GMT10,      //!< Eastern Standard Time
 151         A_ESST = GMT11,     //!< Eastern Summer Time
 152
 153         // New Zealand
 154         NZST = GMT12,       //!< Standard Time
 155         NZDT = GMT13,       //!< Daylight Saving Time
 156
 157         /// Universal Coordinated Time = the new and politically correct name
 158         /// for GMT.
 159         UTC = GMT0
 160     };
 161
 162     /**
 163         Several functions accept an extra parameter specifying the calendar to use
 164         (although most of them only support now the Gregorian calendar). This
 165         parameters is one of the following values.
 166     */
 167     enum Calendar
 168     {
 169         Gregorian,  ///< calendar currently in use in Western countries
 170         Julian      ///< calendar in use since -45 until the 1582 (or later)
 171     };
 172
 173     /**
 174         Values corresponding to different dates of adoption of the Gregorian
 175         calendar.
 176
 177         @see IsGregorianDate
 178      */
 179     enum GregorianAdoption
 180     {
 181         Gr_Unknown,    ///< no data for this country or it's too uncertain to use
 182         Gr_Standard,   ///< on the day 0 of Gregorian calendar: 15 Oct 1582
 183
 184         Gr_Alaska,             ///< Oct 1867 when Alaska became part of the USA
 185         Gr_Albania,            ///< Dec 1912
 186
 187         Gr_Austria = Gr_Unknown,    ///< Different regions on different dates
 188         Gr_Austria_Brixen,          ///< 5 Oct 1583 -> 16 Oct 1583
 189         Gr_Austria_Salzburg = Gr_Austria_Brixen,
 190         Gr_Austria_Tyrol = Gr_Austria_Brixen,
 191         Gr_Austria_Carinthia,       ///< 14 Dec 1583 -> 25 Dec 1583
 192         Gr_Austria_Styria = Gr_Austria_Carinthia,
 193
 194         Gr_Belgium,            ///< Then part of the Netherlands
 195
 196         Gr_Bulgaria = Gr_Unknown, ///< Unknown precisely (from 1915 to 1920)
 197         Gr_Bulgaria_1,         ///<      18 Mar 1916 -> 1 Apr 1916
 198         Gr_Bulgaria_2,         ///<      31 Mar 1916 -> 14 Apr 1916
 199         Gr_Bulgaria_3,         ///<      3 Sep 1920 -> 17 Sep 1920
 200
 201         Gr_Canada = Gr_Unknown,   ///< Different regions followed the changes in
 202                                ///< Great Britain or France
 203
 204         Gr_China = Gr_Unknown,    ///< Different authorities say:
 205         Gr_China_1,            ///<      18 Dec 1911 -> 1 Jan 1912
 206         Gr_China_2,            ///<      18 Dec 1928 -> 1 Jan 1929
 207
 208         Gr_Czechoslovakia,     ///< (Bohemia and Moravia) 6 Jan 1584 -> 17 Jan 1584
 209         Gr_Denmark,            ///< (including Norway) 18 Feb 1700 -> 1 Mar 1700
 210         Gr_Egypt,              ///< 1875
 211         Gr_Estonia,            ///< 1918
 212         Gr_Finland,            ///< Then part of Sweden
 213
 214         Gr_France,             ///< 9 Dec 1582 -> 20 Dec 1582
 215         Gr_France_Alsace,      ///<      4 Feb 1682 -> 16 Feb 1682
 216         Gr_France_Lorraine,    ///<      16 Feb 1760 -> 28 Feb 1760
 217         Gr_France_Strasbourg,  ///< February 1682
 218
 219         Gr_Germany = Gr_Unknown,  ///< Different states on different dates:
 220         Gr_Germany_Catholic,   ///<      1583-1585 (we take 1584)
 221         Gr_Germany_Prussia,    ///<      22 Aug 1610 -> 2 Sep 1610
 222         Gr_Germany_Protestant, ///<      18 Feb 1700 -> 1 Mar 1700
 223
 224         Gr_GreatBritain,       ///< 2 Sep 1752 -> 14 Sep 1752 (use 'cal(1)')
 225
 226         Gr_Greece,             ///< 9 Mar 1924 -> 23 Mar 1924
 227         Gr_Hungary,            ///< 21 Oct 1587 -> 1 Nov 1587
 228         Gr_Ireland = Gr_GreatBritain,
 229         Gr_Italy = Gr_Standard,
 230
 231         Gr_Japan = Gr_Unknown,    ///< Different authorities say:
 232         Gr_Japan_1,            ///<      19 Dec 1872 -> 1 Jan 1873
 233         Gr_Japan_2,            ///<      19 Dec 1892 -> 1 Jan 1893
 234         Gr_Japan_3,            ///<      18 Dec 1918 -> 1 Jan 1919
 235
 236         Gr_Latvia,             ///< 1915-1918 (we take 1915)
 237         Gr_Lithuania,          ///< 1915
 238         Gr_Luxemburg,          ///< 14 Dec 1582 -> 25 Dec 1582
 239         Gr_Netherlands = Gr_Belgium, ///< (including Belgium) 1 Jan 1583
 240
 241         /**
 242             Special case of Groningen.
 243
 244             The Gregorian calendar was introduced twice in Groningen, first
 245             time 28 Feb 1583 was followed by 11 Mar 1583, then it has gone back
 246             to Julian in the summer of 1584 and then 13 Dec 1700 was followed
 247             by 12 Jan 1701 -- which is the date we take into account here.
 248          */
 249         Gr_Netherlands_Groningen,  ///< 13 Dec 1700 -> 12 Jan 1701
 250         Gr_Netherlands_Gelderland, ///< 30 Jun 1700 -> 12 Jul 1700
 251         Gr_Netherlands_Utrecht,    ///< (and Overijssel) 30 Nov 1700->12 Dec 1700
 252         Gr_Netherlands_Friesland,  ///< (and Drenthe) 31 Dec 1700 -> 12 Jan 1701
 253
 254         Gr_Norway = Gr_Denmark,       ///< Then part of Denmark
 255         Gr_Poland = Gr_Standard,
 256         Gr_Portugal = Gr_Standard,
 257         Gr_Romania,                ///< 31 Mar 1919 -> 14 Apr 1919
 258         Gr_Russia,                 ///< 31 Jan 1918 -> 14 Feb 1918
 259         Gr_Scotland = Gr_GreatBritain,
 260         Gr_Spain = Gr_Standard,
 261
 262         /**
 263             Special case of Sweden.
 264
 265             Sweden has a curious history. Sweden decided to make a gradual
 266             change from the Julian to the Gregorian calendar. By dropping every
 267             leap year from 1700 through 1740 the eleven superfluous days would
 268             be omitted and from 1 Mar 1740 they would be in sync with the
 269             Gregorian calendar. (But in the meantime they would be in sync with
 270             nobody!)
 271
 272             So 1700 (which should have been a leap year in the Julian calendar)
 273             was not a leap year in Sweden. However, by mistake 1704 and 1708
 274             became leap years. This left Sweden out of synchronisation with
 275             both the Julian and the Gregorian world, so they decided to go back
 276             to the Julian calendar. In order to do this, they inserted an extra
 277             day in 1712, making that year a double leap year! So in 1712,
 278             February had 30 days in Sweden.
 279
 280             Later, in 1753, Sweden changed to the Gregorian calendar by
 281             dropping 11 days like everyone else and this is what we use here.
 282          */
 283         Gr_Sweden = Gr_Finland,       ///< 17 Feb 1753 -> 1 Mar 1753
 284
 285         Gr_Switzerland = Gr_Unknown,///< Different cantons used different dates
 286         Gr_Switzerland_Catholic,    ///<      1583, 1584 or 1597 (we take 1584)
 287         Gr_Switzerland_Protestant,  ///<      31 Dec 1700 -> 12 Jan 1701
 288
 289         Gr_Turkey,                 ///< 1 Jan 1927
 290         Gr_USA = Gr_GreatBritain,
 291         Gr_Wales = Gr_GreatBritain,
 292         Gr_Yugoslavia              ///< 1919
 293     };
 294
 295     /**
 296         Date calculations often depend on the country and wxDateTime allows to set
 297         the country whose conventions should be used using SetCountry(). It takes
 298         one of the following values as parameter.
 299     */
 300     enum Country
 301     {
 302         Country_Unknown, ///< no special information for this country
 303         Country_Default, ///< set the default country with SetCountry() method
 304                          ///< or use the default country with any other
 305
 306         Country_WesternEurope_Start,
 307         Country_EEC = Country_WesternEurope_Start,
 308         France,
 309         Germany,
 310         UK,
 311         Country_WesternEurope_End = UK,
 312
 313         Russia,
 314
 315         USA
 316     };
 317
 318     /// symbolic names for the months
 319     enum Month
 320     {
 321         Jan, Feb, Mar, Apr, May, Jun, Jul, Aug, Sep, Oct, Nov, Dec,
 322
 323         /// Invalid month value.
 324         Inv_Month
 325     };
 326
 327     /// symbolic names for the weekdays
 328     enum WeekDay
 329     {
 330         Sun, Mon, Tue, Wed, Thu, Fri, Sat,
 331
 332         /// Invalid week day value.
 333         Inv_WeekDay
 334     };
 335
 336     /// invalid value for the year
 337     enum Year
 338     {
 339         Inv_Year = SHRT_MIN    // should hold in wxDateTime_t
 340     };
 341
 342     /**
 343         Flags to be used with GetMonthName() and GetWeekDayName() functions.
 344     */
 345     enum NameFlags
 346     {
 347         Name_Full = 0x01,       ///< return full name
 348         Name_Abbr = 0x02        ///< return abbreviated name
 349     };
 350
 351     /**
 352         Different parts of the world use different conventions for the week start.
 353         In some countries, the week starts on Sunday, while in others -- on Monday.
 354         The ISO standard doesn't address this issue, so we support both conventions
 355         in the functions whose result depends on it (GetWeekOfYear() and
 356         GetWeekOfMonth()).
 357
 358         The desired behaviour may be specified by giving one of the following
 359         constants as argument to these functions.
 360     */
 361     enum WeekFlags
 362     {
 363         Default_First,   ///< Sunday_First for US, Monday_First for the rest
 364         Monday_First,    ///< week starts with a Monday
 365         Sunday_First     ///< week starts with a Sunday
 366     };
 367
 368
 369     /**
 370         Class representing a time zone.
 371
 372         The representation is simply the offset, in seconds, from UTC.
 373      */
 374     class WXDLLIMPEXP_BASE TimeZone
 375     {
 376     public:
 377         /// Constructor for a named time zone.
 378         TimeZone(TZ tz);
 379
 380         /// Constructor for the given offset in seconds.
 381         TimeZone(long offset = 0);
 382
 383         /// Create a time zone with the given offset in seconds.
 384         static TimeZone Make(long offset);
 385
 386         /// Return the offset of this time zone from UTC, in seconds.
 387         long GetOffset() const;
 388     };
 389
 390     /**
 391         Contains broken down date-time representation.
 392
 393         This struct is analogous to standard C <code>struct tm</code> and uses
 394         the same, not always immediately obvious, conventions for its members:
 395         notably its mon and mday fields count from 0 while yday counts from 1.
 396      */
 397     struct Tm
 398     {
 399         wxDateTime_t msec,  ///< Number of milliseconds.
 400                      sec,   ///< Seconds in 0..59 (60 with leap seconds) range.
 401                      min,   ///< Minutes in 0..59 range.
 402                      hour,  ///< Hours since midnight in 0..23 range.
 403                      mday,  ///< Day of the month in 1..31 range.
 404                      yday;  ///< Day of the year in 0..365 range.
 405         Month mon;          ///< Month, as an enumerated constant.
 406         int year;           ///< Year.
 407
 408         /**
 409             Check if the given date/time is valid (in Gregorian calendar).
 410
 411             Return @false if the components don't correspond to a correct date.
 412          */
 413         bool IsValid() const;
 414
 415         /**
 416             Return the week day corresponding to this date.
 417
 418             Unlike the other fields, the week day is not always available and
 419             so must be accessed using this method as it is computed on demand
 420             when it is called.
 421          */
 422         WeekDay GetWeekDay();
 423     };
 424
 425
 426     /**
 427         @name Constructors, Assignment Operators and Setters
 428
 429         Constructors and various Set() methods are collected here. If you
 430         construct a date object from separate values for day, month and year,
 431         you should use IsValid() method to check that the values were correct
 432         as constructors cannot return an error code.
 433     */
 434     //@{
 435
 436     /**
 437         Default constructor. Use one of the Set() functions to initialize the
 438         object later.
 439     */
 440     wxDateTime();
 441
 442     /**
 443        Copy constructor.
 444     */
 445     wxDateTime(const wxDateTime& date);
 446
 447     /**
 448         Same as Set().
 449
 450         @beginWxPythonOnly
 451         This constructor is named "wxDateTimeFromTimeT" in wxPython.
 452         @endWxPythonOnly
 453     */
 454     wxDateTime(time_t timet);
 455     /**
 456         Same as Set().
 457
 458         @beginWxPythonOnly Unsupported. @endWxPythonOnly
 459     */
 460     wxDateTime(const struct tm& tm);
 461     /**
 462         Same as Set().
 463
 464         @beginWxPythonOnly
 465         This constructor is named "wxDateTimeFromJDN" in wxPython.
 466         @endWxPythonOnly
 467     */
 468     wxDateTime(double jdn);
 469     /**
 470         Same as Set().
 471
 472         @beginWxPythonOnly
 473         This constructor is named "wxDateTimeFromHMS" in wxPython.
 474         @endWxPythonOnly
 475     */
 476     wxDateTime(wxDateTime_t hour, wxDateTime_t minute = 0,
 477                wxDateTime_t second = 0, wxDateTime_t millisec = 0);
 478     /**
 479         Same as Set().
 480
 481         @beginWxPythonOnly
 482         This constructor is named "wxDateTimeFromDMY" in wxPython.
 483         @endWxPythonOnly
 484     */
 485     wxDateTime(wxDateTime_t day, Month month,
 486                int year = Inv_Year, wxDateTime_t hour = 0,
 487                wxDateTime_t minute = 0, wxDateTime_t second = 0,
 488                wxDateTime_t millisec = 0);
 489
 490     /**
 491         Same as SetFromMSWSysTime.
 492
 493         @param st
 494             Input, Windows SYSTEMTIME reference
 495         @since 2.9.0
 496         @remarks MSW only
 497         @onlyfor{wxmsw}
 498     */
 499     wxDateTime(const struct _SYSTEMTIME& st);
 500
 501
 502     /**
 503         Reset time to midnight (00:00:00) without changing the date.
 504     */
 505     wxDateTime& ResetTime();
 506
 507     /**
 508         Constructs the object from @a timet value holding the number of seconds
 509         since Jan 1, 1970.
 510
 511         @beginWxPythonOnly
 512         This method is named "SetTimeT" in wxPython.
 513         @endWxPythonOnly
 514     */
 515     wxDateTime& Set(time_t timet);
 516     /**
 517         Sets the date and time from the broken down representation in the
 518         standard @a tm structure.
 519
 520         @beginWxPythonOnly Unsupported. @endWxPythonOnly
 521     */
 522     wxDateTime& Set(const struct tm& tm);
 523
 524     /**
 525        Sets the date and time from the broken down representation in the
 526        @a wxDateTime::Tm structure.
 527     */
 528     wxDateTime& Set(const Tm& tm);
 529
 530     /**
 531         Sets the date from the so-called Julian Day Number.
 532
 533         By definition, the Julian Day Number, usually abbreviated as JDN, of a
 534         particular instant is the fractional number of days since 12 hours
 535         Universal Coordinated Time (Greenwich mean noon) on January 1 of the
 536         year -4712 in the Julian proleptic calendar.
 537
 538         @beginWxPythonOnly
 539         This method is named "SetJDN" in wxPython.
 540         @endWxPythonOnly
 541     */
 542     wxDateTime& Set(double jdn);
 543     /**
 544         Sets the date to be equal to Today() and the time from supplied
 545         parameters.
 546
 547         @beginWxPythonOnly
 548         This method is named "SetHMS" in wxPython.
 549         @endWxPythonOnly
 550     */
 551     wxDateTime& Set(wxDateTime_t hour, wxDateTime_t minute = 0,
 552                     wxDateTime_t second = 0, wxDateTime_t millisec = 0);
 553     /**
 554         Sets the date and time from the parameters.
 555     */
 556     wxDateTime& Set(wxDateTime_t day, Month month,
 557                     int year = Inv_Year, wxDateTime_t hour = 0,
 558                     wxDateTime_t minute = 0, wxDateTime_t second = 0,
 559                     wxDateTime_t millisec = 0);
 560
 561     /**
 562         Sets the day without changing other date components.
 563     */
 564     wxDateTime& SetDay(unsigned short day);
 565
 566     /**
 567         Sets the date from the date and time in DOS format.
 568     */
 569     wxDateTime& SetFromDOS(unsigned long ddt);
 570
 571     /**
 572         Sets the hour without changing other date components.
 573     */
 574     wxDateTime& SetHour(unsigned short hour);
 575
 576     /**
 577         Sets the millisecond without changing other date components.
 578     */
 579     wxDateTime& SetMillisecond(unsigned short millisecond);
 580
 581     /**
 582         Sets the minute without changing other date components.
 583     */
 584     wxDateTime& SetMinute(unsigned short minute);
 585
 586     /**
 587         Sets the month without changing other date components.
 588     */
 589     wxDateTime& SetMonth(Month month);
 590
 591     /**
 592         Sets the second without changing other date components.
 593     */
 594     wxDateTime& SetSecond(unsigned short second);
 595
 596     /**
 597         Sets the date and time of to the current values. Same as assigning the
 598         result of Now() to this object.
 599     */
 600     wxDateTime& SetToCurrent();
 601
 602     /**
 603         Sets the year without changing other date components.
 604     */
 605     wxDateTime& SetYear(int year);
 606
 607     /**
 608         Same as Set().
 609     */
 610     wxDateTime& operator=(time_t timet);
 611     /**
 612         Same as Set().
 613     */
 614     wxDateTime& operator=(const struct tm& tm);
 615
 616     //@}
 617
 618
 619
 620     /**
 621         @name Accessors
 622
 623         Here are the trivial accessors. Other functions, which might have to
 624         perform some more complicated calculations to find the answer are under
 625         the "Date Arithmetics" section.
 626     */
 627     //@{
 628
 629     /**
 630         Returns the date and time in DOS format.
 631     */
 632     unsigned long GetAsDOS() const;
 633
 634     /**
 635         Initialize using the Windows SYSTEMTIME structure.
 636         @param st
 637             Input, Windows SYSTEMTIME reference
 638         @since 2.9.0
 639         @remarks MSW only
 640         @onlyfor{wxmsw}
 641     */
 642     wxDateTime& SetFromMSWSysTime(const struct _SYSTEMTIME& st);
 643
 644     /**
 645         Returns the date and time in the Windows SYSTEMTIME format.
 646         @param st
 647             Output, pointer to Windows SYSTEMTIME
 648         @since 2.9.0
 649         @remarks MSW only
 650         @onlyfor{wxmsw}
 651     */
 652     void GetAsMSWSysTime(struct _SYSTEMTIME* st) const;
 653
 654     /**
 655         Returns the century of this date.
 656     */
 657     int GetCentury(const TimeZone& tz = Local) const;
 658
 659     /**
 660         Returns the object having the same date component as this one but time
 661         of 00:00:00.
 662
 663         @since 2.8.2
 664
 665         @see ResetTime()
 666     */
 667     wxDateTime GetDateOnly() const;
 668
 669     /**
 670         Returns the day in the given timezone (local one by default).
 671     */
 672     unsigned short GetDay(const TimeZone& tz = Local) const;
 673
 674     /**
 675         Returns the day of the year (in 1-366 range) in the given timezone
 676         (local one by default).
 677     */
 678     unsigned short GetDayOfYear(const TimeZone& tz = Local) const;
 679
 680     /**
 681         Returns the hour in the given timezone (local one by default).
 682     */
 683     unsigned short GetHour(const TimeZone& tz = Local) const;
 684
 685     /**
 686         Returns the milliseconds in the given timezone (local one by default).
 687     */
 688     unsigned short GetMillisecond(const TimeZone& tz = Local) const;
 689
 690     /**
 691         Returns the minute in the given timezone (local one by default).
 692     */
 693     unsigned short GetMinute(const TimeZone& tz = Local) const;
 694
 695     /**
 696         Returns the month in the given timezone (local one by default).
 697     */
 698     Month GetMonth(const TimeZone& tz = Local) const;
 699
 700     /**
 701         Returns the seconds in the given timezone (local one by default).
 702     */
 703     unsigned short GetSecond(const TimeZone& tz = Local) const;
 704
 705     /**
 706         Returns the number of seconds since Jan 1, 1970. An assert failure will
 707         occur if the date is not in the range covered by @c time_t type.
 708     */
 709     time_t GetTicks() const;
 710
 711     /**
 712         Returns broken down representation of the date and time.
 713     */
 714     Tm GetTm(const TimeZone& tz = Local) const;
 715
 716     /**
 717         Returns the week day in the given timezone (local one by default).
 718     */
 719     WeekDay GetWeekDay(const TimeZone& tz = Local) const;
 720
 721     /**
 722         Returns the ordinal number of the week in the month (in 1-5 range).
 723
 724         As GetWeekOfYear(), this function supports both conventions for the
 725         week start.
 726     */
 727     wxDateTime_t GetWeekOfMonth(WeekFlags flags = Monday_First,
 728                                 const TimeZone& tz = Local) const;
 729
 730     /**
 731         Returns the number of the week of the year this date is in. The first
 732         week of the year is, according to international standards, the one
 733         containing Jan 4 or, equivalently, the first week which has Thursday in
 734         this year. Both of these definitions are the same as saying that the
 735         first week of the year must contain more than half of its days in this
 736         year. Accordingly, the week number will always be in 1-53 range (52 for
 737         non-leap years).
 738
 739         The function depends on the week start convention specified by the @a flags
 740         argument but its results for @c Sunday_First are not well-defined as the
 741         ISO definition quoted above applies to the weeks starting on Monday only.
 742     */
 743     wxDateTime_t GetWeekOfYear(WeekFlags flags = Monday_First,
 744                                const TimeZone& tz = Local) const;
 745
 746     /**
 747         Returns the year in the given timezone (local one by default).
 748     */
 749     int GetYear(const TimeZone& tz = Local) const;
 750
 751     /**
 752         Returns @true if the given date is later than the date of adoption of
 753         the Gregorian calendar in the given country (and hence the Gregorian
 754         calendar calculations make sense for it).
 755     */
 756     bool IsGregorianDate(GregorianAdoption country = Gr_Standard) const;
 757
 758     /**
 759         Returns @true if the object represents a valid time moment.
 760     */
 761     bool IsValid() const;
 762
 763     /**
 764         Returns @true is this day is not a holiday in the given country.
 765     */
 766     bool IsWorkDay(Country country = Country_Default) const;
 767
 768     //@}
 769
 770
 771
 772     /**
 773         @name Date Comparison
 774
 775         There are several functions to allow date comparison. To supplement
 776         them, a few global operators, etc taking wxDateTime are defined.
 777     */
 778     //@{
 779
 780     /**
 781         Returns @true if this date precedes the given one.
 782     */
 783     bool IsEarlierThan(const wxDateTime& datetime) const;
 784
 785     /**
 786         Returns @true if the two dates are strictly identical.
 787     */
 788     bool IsEqualTo(const wxDateTime& datetime) const;
 789
 790     /**
 791         Returns @true if the date is equal to another one up to the given time
 792         interval, i.e. if the absolute difference between the two dates is less
 793         than this interval.
 794     */
 795     bool IsEqualUpTo(const wxDateTime& dt, const wxTimeSpan& ts) const;
 796
 797     /**
 798         Returns @true if this date is later than the given one.
 799     */
 800     bool IsLaterThan(const wxDateTime& datetime) const;
 801
 802     /**
 803         Returns @true if the date is the same without comparing the time parts.
 804     */
 805     bool IsSameDate(const wxDateTime& dt) const;
 806
 807     /**
 808         Returns @true if the time is the same (although dates may differ).
 809     */
 810     bool IsSameTime(const wxDateTime& dt) const;
 811
 812     /**
 813         Returns @true if this date lies strictly between the two given dates.
 814
 815         @see IsBetween()
 816     */
 817     bool IsStrictlyBetween(const wxDateTime& t1,
 818                             const wxDateTime& t2) const;
 819
 820     /**
 821         Returns @true if IsStrictlyBetween() is @true or if the date is equal
 822         to one of the limit values.
 823
 824         @see IsStrictlyBetween()
 825     */
 826     bool IsBetween(const wxDateTime& t1, const wxDateTime& t2) const;
 827
 828     //@}
 829
 830
 831
 832     /**
 833         @name Date Arithmetics
 834
 835         These functions carry out
 836         @ref overview_datetime_arithmetics "arithmetics" on the wxDateTime
 837         objects. As explained in the overview, either wxTimeSpan or wxDateSpan
 838         may be added to wxDateTime, hence all functions are overloaded to
 839         accept both arguments.
 840
 841         Also, both Add() and Subtract() have both const and non-const version.
 842         The first one returns a new object which represents the sum/difference
 843         of the original one with the argument while the second form modifies
 844         the object to which it is applied. The operators "-=" and "+=" are
 845         defined to be equivalent to the second forms of these functions.
 846     */
 847     //@{
 848
 849     /**
 850         Adds the given date span to this object.
 851
 852         @beginWxPythonOnly
 853         This method is named "AddDS" in wxPython.
 854         @endWxPythonOnly
 855     */
 856     wxDateTime Add(const wxDateSpan& diff) const;
 857     /**
 858         Adds the given date span to this object.
 859
 860         @beginWxPythonOnly
 861         This method is named "AddDS" in wxPython.
 862         @endWxPythonOnly
 863     */
 864     wxDateTime Add(const wxDateSpan& diff);
 865     /**
 866         Adds the given time span to this object.
 867
 868         @beginWxPythonOnly
 869         This method is named "AddTS" in wxPython.
 870         @endWxPythonOnly
 871     */
 872     wxDateTime Add(const wxTimeSpan& diff) const;
 873     /**
 874         Adds the given time span to this object.
 875
 876         @beginWxPythonOnly
 877         This method is named "AddTS" in wxPython.
 878         @endWxPythonOnly
 879     */
 880     wxDateTime& Add(const wxTimeSpan& diff);
 881
 882     /**
 883         Subtracts the given time span from this object.
 884
 885         @beginWxPythonOnly
 886         This method is named "SubtractTS" in wxPython.
 887         @endWxPythonOnly
 888     */
 889     wxDateTime Subtract(const wxTimeSpan& diff) const;
 890     /**
 891         Subtracts the given time span from this object.
 892
 893         @beginWxPythonOnly
 894         This method is named "SubtractTS" in wxPython.
 895         @endWxPythonOnly
 896     */
 897     wxDateTime& Subtract(const wxTimeSpan& diff);
 898     /**
 899         Subtracts the given date span from this object.
 900
 901         @beginWxPythonOnly
 902         This method is named "SubtractDS" in wxPython.
 903         @endWxPythonOnly
 904     */
 905     wxDateTime Subtract(const wxDateSpan& diff) const;
 906     /**
 907         Subtracts the given date span from this object.
 908
 909         @beginWxPythonOnly
 910         This method is named "SubtractDS" in wxPython.
 911         @endWxPythonOnly
 912     */
 913     wxDateTime& Subtract(const wxDateSpan& diff);
 914     /**
 915         Subtracts another date from this one and returns the difference between
 916         them as a wxTimeSpan.
 917     */
 918     wxTimeSpan Subtract(const wxDateTime& dt) const;
 919
 920     /**
 921         Adds the given date span to this object.
 922     */
 923     wxDateTime& operator+=(const wxDateSpan& diff);
 924     /**
 925         Subtracts the given date span from this object.
 926     */
 927     wxDateTime& operator-=(const wxDateSpan& diff);
 928     /**
 929         Adds the given time span to this object.
 930     */
 931     wxDateTime& operator+=(const wxTimeSpan& diff);
 932     /**
 933         Subtracts the given time span from this object.
 934     */
 935     wxDateTime& operator-=(const wxTimeSpan& diff);
 936
 937     //@}
 938
 939
 940
 941     /**
 942         @name Date Formatting and Parsing
 943
 944         See @ref datetime_formatting
 945     */
 946     //@{
 947
 948     /**
 949         This function does the same as the standard ANSI C @c strftime(3)
 950         function (http://www.cplusplus.com/reference/clibrary/ctime/strftime.html).
 951         Please see its description for the meaning of @a format parameter.
 952
 953         It also accepts a few wxWidgets-specific extensions: you can optionally
 954         specify the width of the field to follow using @c printf(3)-like syntax
 955         and the format specification @c "%l" can be used to get the number of
 956         milliseconds.
 957
 958         @see ParseFormat()
 959     */
 960     wxString Format(const wxString& format = wxDefaultDateTimeFormat,
 961                     const TimeZone& tz = Local) const;
 962
 963     /**
 964         Identical to calling Format() with @c "%x" argument (which means
 965         "preferred date representation for the current locale").
 966     */
 967     wxString FormatDate() const;
 968
 969     /**
 970         Returns the combined date-time representation in the ISO 8601 format
 971         @c "YYYY-MM-DDTHH:MM:SS". The @a sep parameter default value produces
 972         the result exactly corresponding to the ISO standard, but it can also
 973         be useful to use a space as separator if a more human-readable combined
 974         date-time representation is needed.
 975
 976         @see FormatISODate(), FormatISOTime(), ParseISOCombined()
 977     */
 978     wxString FormatISOCombined(char sep = 'T') const;
 979
 980     /**
 981         This function returns the date representation in the ISO 8601 format
 982         @c "YYYY-MM-DD".
 983     */
 984     wxString FormatISODate() const;
 985
 986     /**
 987         This function returns the time representation in the ISO 8601 format
 988         @c "HH:MM:SS".
 989     */
 990     wxString FormatISOTime() const;
 991
 992     /**
 993         Identical to calling Format() with @c "%X" argument (which means
 994         "preferred time representation for the current locale").
 995     */
 996     wxString FormatTime() const;
 997
 998     /**
 999         This function is like ParseDateTime(), but it only allows the date to
1000         be specified.
1001
1002         It is thus less flexible then ParseDateTime(), but also has less
1003         chances to misinterpret the user input.
1004
1005         See ParseFormat() for the description of function parameters and return
1006         value.
1007
1008         @see Format()
1009     */
1010     bool ParseDate(const wxString& date, wxString::const_iterator *end);
1011
1012     /**
1013         Parses the string @a datetime containing the date and time in free
1014         format.
1015
1016         This function tries as hard as it can to interpret the given string as
1017         date and time. Unlike ParseRfc822Date(), it will accept anything that
1018         may be accepted and will only reject strings which cannot be parsed in
1019         any way at all. Notice that the function will fail if either date or
1020         time part is present but not both, use ParseDate() or ParseTime() to
1021         parse strings containing just the date or time component.
1022
1023         See ParseFormat() for the description of function parameters and return
1024         value.
1025     */
1026     bool ParseDateTime(const wxString& datetime, wxString::const_iterator *end);
1027
1028     /**
1029         This function parses the string @a date according to the given
1030         @e format. The system @c strptime(3) function is used whenever
1031         available, but even if it is not, this function is still implemented,
1032         although support for locale-dependent format specifiers such as
1033         @c "%c", @c "%x" or @c "%X" may not be perfect and GNU extensions such
1034         as @c "%z" and @c "%Z" are not implemented. This function does handle
1035         the month and weekday names in the current locale on all platforms,
1036         however.
1037
1038         Please see the description of the ANSI C function @c strftime(3) for
1039         the syntax of the format string.
1040
1041         The @a dateDef parameter is used to fill in the fields which could not
1042         be determined from the format string. For example, if the format is
1043         @c "%d" (the day of the month), the month and the year are taken from
1044         @a dateDef. If it is not specified, Today() is used as the default
1045         date.
1046
1047         Example of using this function:
1048         @code
1049             wxDateTime dt;
1050             wxString str = "...";
1051             wxString::const_iterator end;
1052             if ( !dt.ParseFormat(str, "%Y-%m-%d", &end) )
1053                 ... parsing failed ...
1054             else if ( end == str.end() )
1055                 ... entire string parsed ...
1056             else
1057                 ... wxString(end, str.end()) left over ...
1058         @endcode
1059
1060         @param date
1061             The string to be parsed.
1062         @param format
1063             strptime()-like format string.
1064         @param dateDef
1065             Used to fill in the date components not specified in the @a date
1066             string.
1067         @param end
1068             Will be filled with the iterator pointing to the location where the
1069             parsing stopped if the function returns @true. If the entire string
1070             was consumed, it is set to @c date.end(). Notice that this argument
1071             must be non-@NULL.
1072         @return
1073             @true if at least part of the string was parsed successfully,
1074             @false otherwise.
1075
1076         @see Format()
1077     */
1078     bool ParseFormat(const wxString& date,
1079                      const wxString& format,
1080                      const wxDateTime& dateDef,
1081                      wxString::const_iterator *end);
1082
1083     /**
1084         @overload
1085     */
1086     bool ParseFormat(const wxString& date,
1087                      const wxString& format,
1088                      wxString::const_iterator *end);
1089
1090     /**
1091         @overload
1092     */
1093     bool ParseFormat(const wxString& date, wxString::const_iterator *end);
1094
1095     /**
1096         This function parses the string containing the date and time in ISO
1097         8601 combined format @c "YYYY-MM-DDTHH:MM:SS". The separator between
1098         the date and time parts must be equal to @a sep for the function to
1099         succeed.
1100
1101         @return @true if the entire string was parsed successfully, @false
1102                  otherwise.
1103     */
1104     bool ParseISOCombined(const wxString& date, char sep = 'T');
1105
1106     /**
1107         This function parses the date in ISO 8601 format @c "YYYY-MM-DD".
1108
1109         @return @true if the entire string was parsed successfully, @false
1110                  otherwise.
1111     */
1112     bool ParseISODate(const wxString& date);
1113
1114     /**
1115         This function parses the time in ISO 8601 format @c "HH:MM:SS".
1116
1117         @return @true if the entire string was parsed successfully, @false
1118                  otherwise.
1119     */
1120     bool ParseISOTime(const wxString& date);
1121
1122     /**
1123         Parses the string @a date looking for a date formatted according to the
1124         RFC 822 in it. The exact description of this format may, of course, be
1125         found in the RFC (section 5), but, briefly, this is the format used in
1126         the headers of Internet email messages and one of the most common
1127         strings expressing date in this format may be something like
1128         @c "Sat, 18 Dec 1999 00:48:30 +0100".
1129
1130         Returns @NULL if the conversion failed, otherwise return the pointer to
1131         the character immediately following the part of the string which could
1132         be parsed. If the entire string contains only the date in RFC 822
1133         format, the returned pointer will be pointing to a @c NUL character.
1134
1135         This function is intentionally strict, it will return an error for any
1136         string which is not RFC 822 compliant. If you need to parse date
1137         formatted in more free ways, you should use ParseDateTime() or
1138         ParseDate() instead.
1139
1140         See ParseFormat() for the description of function parameters and return
1141         value.
1142     */
1143     bool ParseRfc822Date(const wxString& date, wxString::const_iterator *end);
1144
1145     /**
1146         This functions is like ParseDateTime(), but only allows the time to be
1147         specified in the input string.
1148
1149         See ParseFormat() for the description of function parameters and return
1150         value.
1151     */
1152     bool ParseTime(const wxString& time, wxString::const_iterator *end);
1153
1154     //@}
1155
1156
1157
1158     /**
1159         @name Calendar Calculations
1160
1161         The functions in this section perform the basic calendar calculations,
1162         mostly related to the week days. They allow to find the given week day
1163         in the week with given number (either in the month or in the year) and
1164         so on.
1165
1166         None of the functions in this section modify the time part of the
1167         wxDateTime, they only work with the date part of it.
1168     */
1169     //@{
1170
1171     /**
1172         Returns the copy of this object to which SetToLastMonthDay() was
1173         applied.
1174     */
1175     wxDateTime GetLastMonthDay(Month month = Inv_Month,
1176                                int year = Inv_Year) const;
1177
1178     /**
1179         Returns the copy of this object to which SetToLastWeekDay() was
1180         applied.
1181     */
1182     wxDateTime GetLastWeekDay(WeekDay weekday, Month month = Inv_Month,
1183                               int year = Inv_Year);
1184
1185     /**
1186         Returns the copy of this object to which SetToNextWeekDay() was
1187         applied.
1188     */
1189     wxDateTime GetNextWeekDay(WeekDay weekday) const;
1190
1191     /**
1192         Returns the copy of this object to which SetToPrevWeekDay() was
1193         applied.
1194     */
1195     wxDateTime GetPrevWeekDay(WeekDay weekday) const;
1196
1197     /**
1198         Returns the copy of this object to which SetToWeekDay() was applied.
1199     */
1200     wxDateTime GetWeekDay(WeekDay weekday, int n = 1, Month month = Inv_Month,
1201                           int year = Inv_Year) const;
1202
1203     /**
1204         Returns the copy of this object to which SetToWeekDayInSameWeek() was
1205         applied.
1206     */
1207     wxDateTime GetWeekDayInSameWeek(WeekDay weekday,
1208                                     WeekFlags flags = Monday_First) const;
1209
1210     /**
1211         Returns the copy of this object to which SetToYearDay() was applied.
1212     */
1213     wxDateTime GetYearDay(wxDateTime_t yday) const;
1214
1215     /**
1216         Sets the date to the last day in the specified month (the current one
1217         by default).
1218
1219         @return The reference to the modified object itself.
1220     */
1221     wxDateTime& SetToLastMonthDay(Month month = Inv_Month, int year = Inv_Year);
1222
1223     /**
1224         The effect of calling this function is the same as of calling
1225         @c SetToWeekDay(-1, weekday, month, year). The date will be set to the
1226         last @a weekday in the given month and year (the current ones by
1227         default). Always returns @true.
1228     */
1229     bool SetToLastWeekDay(WeekDay weekday, Month month = Inv_Month,
1230                           int year = Inv_Year);
1231
1232     /**
1233         Sets the date so that it will be the first @a weekday following the
1234         current date.
1235
1236         @return The reference to the modified object itself.
1237     */
1238     wxDateTime& SetToNextWeekDay(WeekDay weekday);
1239
1240     /**
1241         Sets the date so that it will be the last @a weekday before the current
1242         date.
1243
1244         @return The reference to the modified object itself.
1245     */
1246     wxDateTime& SetToPrevWeekDay(WeekDay weekday);
1247
1248     /**
1249         Sets the date to the @e n-th @a weekday in the given month of the given
1250         year (the current month and year are used by default). The parameter
1251         @a n may be either positive (counting from the beginning of the month)
1252         or negative (counting from the end of it).
1253
1254         For example, SetToWeekDay(2, wxDateTime::Wed) will set the date to the
1255         second Wednesday in the current month and
1256         SetToWeekDay(-1, wxDateTime::Sun) will set the date to the last Sunday
1257         in the current month.
1258
1259         @return @true if the date was modified successfully, @false otherwise
1260                  meaning that the specified date doesn't exist.
1261     */
1262     bool SetToWeekDay(WeekDay weekday, int n = 1,
1263                        Month month = Inv_Month, int year = Inv_Year);
1264
1265     /**
1266         Adjusts the date so that it will still lie in the same week as before,
1267         but its week day will be the given one.
1268
1269         @return The reference to the modified object itself.
1270     */
1271     wxDateTime& SetToWeekDayInSameWeek(WeekDay weekday,
1272                                       WeekFlags flags = Monday_First);
1273
1274     /**
1275         Sets the date to the day number @a yday in the same year (i.e., unlike
1276         the other functions, this one does not use the current year). The day
1277         number should be in the range 1-366 for the leap years and 1-365 for
1278         the other ones.
1279
1280         @return The reference to the modified object itself.
1281     */
1282     wxDateTime& SetToYearDay(wxDateTime_t yday);
1283
1284     //@}
1285
1286
1287
1288     /**
1289         @name Astronomical/Historical Functions
1290
1291         Some degree of support for the date units used in astronomy and/or
1292         history is provided. You can construct a wxDateTime object from a
1293         JDN and you may also get its JDN, MJD or Rata Die number from it.
1294
1295         Related functions in other groups: wxDateTime(double), Set(double)
1296     */
1297     //@{
1298
1299     /**
1300         Synonym for GetJulianDayNumber().
1301     */
1302     double GetJDN() const;
1303
1304     /**
1305         Returns the JDN corresponding to this date. Beware of rounding errors!
1306
1307         @see GetModifiedJulianDayNumber()
1308     */
1309     double GetJulianDayNumber() const;
1310
1311     /**
1312         Synonym for GetModifiedJulianDayNumber().
1313     */
1314     double GetMJD() const;
1315
1316     /**
1317         Returns the @e "Modified Julian Day Number" (MJD) which is, by
1318         definition, is equal to JDN - 2400000.5.
1319         The MJDs are simpler to work with as the integral MJDs correspond to
1320         midnights of the dates in the Gregorian calendar and not the noons like
1321         JDN. The MJD 0 represents Nov 17, 1858.
1322     */
1323     double GetModifiedJulianDayNumber() const;
1324
1325     /**
1326         Return the @e Rata Die number of this date.
1327
1328         By definition, the Rata Die number is a date specified as the number of
1329         days relative to a base date of December 31 of the year 0. Thus January
1330         1 of the year 1 is Rata Die day 1.
1331     */
1332     double GetRataDie() const;
1333
1334     //@}
1335
1336
1337
1338     /**
1339         @name Time Zone and DST Support
1340
1341         Please see the @ref overview_datetime_timezones "time zone overview"
1342         for more information about time zones. Normally, these functions should
1343         be rarely used.
1344
1345         Related functions in other groups: GetBeginDST(), GetEndDST()
1346     */
1347     //@{
1348
1349     /**
1350         Transform the date from the given time zone to the local one. If
1351         @a noDST is @true, no DST adjustments will be made.
1352
1353         @return The date in the local time zone.
1354     */
1355     wxDateTime FromTimezone(const TimeZone& tz, bool noDST = false) const;
1356
1357     /**
1358         Returns @true if the DST is applied for this date in the given country.
1359
1360         @see GetBeginDST(), GetEndDST()
1361     */
1362     int IsDST(Country country = Country_Default) const;
1363
1364     /**
1365         Same as FromTimezone() but modifies the object in place.
1366     */
1367     wxDateTime& MakeFromTimezone(const TimeZone& tz, bool noDST = false);
1368
1369     /**
1370         Modifies the object in place to represent the date in another time
1371         zone. If @a noDST is @true, no DST adjustments will be made.
1372     */
1373     wxDateTime& MakeTimezone(const TimeZone& tz, bool noDST = false);
1374
1375     /**
1376         This is the same as calling MakeTimezone() with the argument @c GMT0.
1377     */
1378     wxDateTime& MakeUTC(bool noDST = false);
1379
1380     /**
1381         Transform the date to the given time zone. If @a noDST is @true, no DST
1382         adjustments will be made.
1383
1384         @return The date in the new time zone.
1385     */
1386     wxDateTime ToTimezone(const TimeZone& tz, bool noDST = false) const;
1387
1388     /**
1389         This is the same as calling ToTimezone() with the argument @c GMT0.
1390     */
1391     wxDateTime ToUTC(bool noDST = false) const;
1392
1393     //@}
1394
1395
1396
1397
1398
1399     /**
1400         Converts the year in absolute notation (i.e. a number which can be
1401         negative, positive or zero) to the year in BC/AD notation. For the
1402         positive years, nothing is done, but the year 0 is year 1 BC and so for
1403         other years there is a difference of 1.
1404
1405         This function should be used like this:
1406
1407         @code
1408         wxDateTime dt(...);
1409         int y = dt.GetYear();
1410         printf("The year is %d%s", wxDateTime::ConvertYearToBC(y), y > 0 ? "AD" : "BC");
1411         @endcode
1412     */
1413     static int ConvertYearToBC(int year);
1414
1415     /**
1416         Returns the translations of the strings @c AM and @c PM used for time
1417         formatting for the current locale. Either of the pointers may be @NULL
1418         if the corresponding value is not needed.
1419     */
1420     static void GetAmPmStrings(wxString* am, wxString* pm);
1421
1422     /**
1423         Get the beginning of DST for the given country in the given year
1424         (current one by default). This function suffers from limitations
1425         described in the @ref overview_datetime_dst "DST overview".
1426
1427         @see GetEndDST()
1428     */
1429     static wxDateTime GetBeginDST(int year = Inv_Year,
1430                                    Country country = Country_Default);
1431
1432     /**
1433         Returns the end of DST for the given country in the given year (current
1434         one by default).
1435
1436         @see GetBeginDST()
1437     */
1438     static wxDateTime GetEndDST(int year = Inv_Year,
1439                                  Country country = Country_Default);
1440
1441     /**
1442         Get the current century, i.e. first two digits of the year, in given
1443         calendar (only Gregorian is currently supported).
1444     */
1445     static int GetCentury(int year);
1446
1447     /**
1448         Returns the current default country. The default country is used for
1449         DST calculations, for example.
1450
1451         @see SetCountry()
1452     */
1453     static Country GetCountry();
1454
1455     /**
1456         Get the current month in given calendar (only Gregorian is currently
1457         supported).
1458     */
1459     static Month GetCurrentMonth(Calendar cal = Gregorian);
1460
1461     /**
1462         Get the current year in given calendar (only Gregorian is currently
1463         supported).
1464     */
1465     static int GetCurrentYear(Calendar cal = Gregorian);
1466
1467     /**
1468         Return the standard English name of the given month.
1469
1470         This function always returns "January" or "Jan" for January, use
1471         GetMonthName() to retrieve the name of the month in the users current
1472         locale.
1473
1474         @param month
1475             One of wxDateTime::Jan, ..., wxDateTime::Dec values.
1476         @param flags
1477             Either Name_Full (default) or Name_Abbr.
1478
1479         @see GetEnglishWeekDayName()
1480
1481         @since 2.9.0
1482      */
1483     static wxString GetEnglishMonthName(Month month,
1484                                         NameFlags flags = Name_Full);
1485
1486     /**
1487         Return the standard English name of the given week day.
1488
1489         This function always returns "Monday" or "Mon" for Monday, use
1490         GetWeekDayName() to retrieve the name of the month in the users current
1491         locale.
1492
1493         @param weekday
1494             One of wxDateTime::Sun, ..., wxDateTime::Sat values.
1495         @param flags
1496             Either Name_Full (default) or Name_Abbr.
1497
1498         @see GetEnglishMonthName()
1499
1500         @since 2.9.0
1501      */
1502     static wxString GetEnglishWeekDayName(WeekDay weekday,
1503                                           NameFlags flags = Name_Full);
1504
1505     /**
1506         Gets the full (default) or abbreviated name of the given month.
1507
1508         This function returns the name in the current locale, use
1509         GetEnglishMonthName() to get the untranslated name if necessary.
1510
1511         @param month
1512             One of wxDateTime::Jan, ..., wxDateTime::Dec values.
1513         @param flags
1514             Either Name_Full (default) or Name_Abbr.
1515
1516         @see GetWeekDayName()
1517     */
1518     static wxString GetMonthName(Month month, NameFlags flags = Name_Full);
1519
1520     /**
1521         Returns the number of days in the given year. The only supported value
1522         for @a cal currently is @c Gregorian.
1523
1524         @beginWxPythonOnly
1525         This method is named "GetNumberOfDaysInYear" in wxPython.
1526         @endWxPythonOnly
1527     */
1528     static wxDateTime_t GetNumberOfDays(int year, Calendar cal = Gregorian);
1529
1530     /**
1531         Returns the number of days in the given month of the given year. The
1532         only supported value for @a cal currently is @c Gregorian.
1533
1534         @beginWxPythonOnly
1535         This method is named "GetNumberOfDaysInMonth" in wxPython.
1536         @endWxPythonOnly
1537     */
1538     static wxDateTime_t GetNumberOfDays(Month month, int year = Inv_Year,
1539                                         Calendar cal = Gregorian);
1540
1541     /**
1542         Returns the current time.
1543     */
1544     static time_t GetTimeNow();
1545
1546     /**
1547         Returns the current time broken down using the buffer whose address is
1548         passed to the function with @a tm to store the result.
1549     */
1550     static tm* GetTmNow(struct tm *tm);
1551
1552     /**
1553         Returns the current time broken down. Note that this function returns a
1554         pointer to a static buffer that's reused by calls to this function and
1555         certain C library functions (e.g. localtime). If there is any chance
1556         your code might be used in a multi-threaded application, you really
1557         should use GetTmNow(struct tm *) instead.
1558     */
1559     static tm* GetTmNow();
1560
1561     /**
1562         Gets the full (default) or abbreviated name of the given week day.
1563
1564         This function returns the name in the current locale, use
1565         GetEnglishWeekDayName() to get the untranslated name if necessary.
1566
1567         @param weekday
1568             One of wxDateTime::Sun, ..., wxDateTime::Sat values.
1569         @param flags
1570             Either Name_Full (default) or Name_Abbr.
1571
1572         @see GetMonthName()
1573     */
1574     static wxString GetWeekDayName(WeekDay weekday,
1575                                    NameFlags flags = Name_Full);
1576
1577     /**
1578         Returns @true if DST was used in the given year (the current one by
1579         default) in the given country.
1580     */
1581     static bool IsDSTApplicable(int year = Inv_Year,
1582                                   Country country = Country_Default);
1583
1584     /**
1585         Returns @true if the @a year is a leap one in the specified calendar.
1586         This functions supports Gregorian and Julian calendars.
1587     */
1588     static bool IsLeapYear(int year = Inv_Year, Calendar cal = Gregorian);
1589
1590     /**
1591         This function returns @true if the specified (or default) country is
1592         one of Western European ones. It is used internally by wxDateTime to
1593         determine the DST convention and date and time formatting rules.
1594     */
1595     static bool IsWestEuropeanCountry(Country country = Country_Default);
1596
1597     /**
1598         Returns the object corresponding to the current time.
1599
1600         Example:
1601
1602         @code
1603         wxDateTime now = wxDateTime::Now();
1604         printf("Current time in Paris:\t%s\n", now.Format("%c", wxDateTime::CET).c_str());
1605         @endcode
1606
1607         @note This function is accurate up to seconds. UNow() can be used if
1608               better precision is required.
1609
1610         @see Today()
1611     */
1612     static wxDateTime Now();
1613
1614     /**
1615         Sets the country to use by default. This setting influences the DST
1616         calculations, date formatting and other things.
1617
1618         @see GetCountry()
1619     */
1620     static void SetCountry(Country country);
1621
1622     /**
1623         Set the date to the given @a weekday in the week number @a numWeek of
1624         the given @a year . The number should be in range 1-53.
1625
1626         Note that the returned date may be in a different year than the one
1627         passed to this function because both the week 1 and week 52 or 53 (for
1628         leap years) contain days from different years. See GetWeekOfYear() for
1629         the explanation of how the year weeks are counted.
1630     */
1631     static wxDateTime SetToWeekOfYear(int year, wxDateTime_t numWeek,
1632                                        WeekDay weekday = Mon);
1633
1634     /**
1635         Returns the object corresponding to the midnight of the current day
1636         (i.e. the same as Now(), but the time part is set to 0).
1637
1638         @see Now()
1639     */
1640     static wxDateTime Today();
1641
1642     /**
1643         Returns the object corresponding to the current UTC time including the
1644         milliseconds.
1645
1646         Notice that unlike Now(), this method creates a wxDateTime object
1647         corresponding to UTC, not local, time.
1648
1649         @see Now(), wxGetUTCTimeMillis()
1650     */
1651     static wxDateTime UNow();
1652 };
1653
1654 /**
1655     Global instance of an empty wxDateTime object.
1656
1657     @todo Would it be better to rename this wxNullDateTime so it's consistent
1658           with the rest of the "empty/invalid/null" global objects?
1659 */
1660 const wxDateTime wxDefaultDateTime;
1661
1662 /*
1663     wxInvalidDateTime is an alias for wxDefaultDateTime.
1664 */
1665 #define wxInvalidDateTime wxDefaultDateTime
1666
1667
1668 /**
1669     @class wxDateTimeWorkDays
1670
1671     @todo Write wxDateTimeWorkDays documentation.
1672
1673     @library{wxbase}
1674     @category{data}
1675 */
1676 class wxDateTimeWorkDays
1677 {
1678 public:
1679
1680 };
1681
1682
1683
1684 /**
1685     @class wxDateSpan
1686
1687     This class is a "logical time span" and is useful for implementing program
1688     logic for such things as "add one month to the date" which, in general,
1689     doesn't mean to add 60*60*24*31 seconds to it, but to take the same date
1690     the next month (to understand that this is indeed different consider adding
1691     one month to Feb, 15 -- we want to get Mar, 15, of course).
1692
1693     When adding a month to the date, all lesser components (days, hours, ...)
1694     won't be changed unless the resulting date would be invalid: for example,
1695     Jan 31 + 1 month will be Feb 28, not (non-existing) Feb 31.
1696
1697     Because of this feature, adding and subtracting back again the same
1698     wxDateSpan will @b not, in general, give back the original date: Feb 28 - 1
1699     month will be Jan 28, not Jan 31!
1700
1701     wxDateSpan objects can be either positive or negative. They may be
1702     multiplied by scalars which multiply all deltas by the scalar: i.e.
1703     2*(1  month and  1  day) is 2 months and 2 days. They can be added together
1704     with wxDateTime or wxTimeSpan, but the type of result is different for each
1705     case.
1706
1707     @warning If you specify both weeks and days, the total number of days added
1708              will be 7*weeks + days! See also GetTotalDays().
1709
1710     Equality operators are defined for wxDateSpans. Two wxDateSpans are equal
1711     if and only if they both give the same target date when added to @b every
1712     source date. Thus wxDateSpan::Months(1) is not equal to
1713     wxDateSpan::Days(30), because they don't give the same date when added to
1714     Feb 1st. But wxDateSpan::Days(14) is equal to wxDateSpan::Weeks(2).
1715
1716     Finally, notice that for adding hours, minutes and so on you don't need
1717     this class at all: wxTimeSpan will do the job because there are no
1718     subtleties associated with those (we don't support leap seconds).
1719
1720     @library{wxbase}
1721     @category{data}
1722
1723     @see @ref overview_datetime, wxDateTime
1724 */
1725 class wxDateSpan
1726 {
1727 public:
1728     /**
1729         Constructs the date span object for the given number of years, months,
1730         weeks and days. Note that the weeks and days add together if both are
1731         given.
1732     */
1733     wxDateSpan(int years = 0, int months = 0, int weeks = 0, int days = 0);
1734
1735     /**
1736         Returns the sum of two date spans.
1737
1738         @return A new wxDateSpan object with the result.
1739     */
1740     wxDateSpan Add(const wxDateSpan& other) const;
1741     /**
1742         Adds the given wxDateSpan to this wxDateSpan and returns a reference
1743         to itself.
1744     */
1745     wxDateSpan& Add(const wxDateSpan& other);
1746
1747     /**
1748         Returns a date span object corresponding to one day.
1749
1750         @see Days()
1751     */
1752     static wxDateSpan Day();
1753
1754     /**
1755         Returns a date span object corresponding to the given number of days.
1756
1757         @see Day()
1758     */
1759     static wxDateSpan Days(int days);
1760
1761     /**
1762         Returns the number of days (not counting the weeks component) in this
1763         date span.
1764
1765         @see GetTotalDays()
1766     */
1767     int GetDays() const;
1768
1769     /**
1770         Returns the number of the months (not counting the years) in this date
1771         span.
1772     */
1773     int GetMonths() const;
1774
1775     /**
1776         Returns the combined number of days in this date span, counting both
1777         weeks and days. This doesn't take months or years into account.
1778
1779         @see GetWeeks(), GetDays()
1780     */
1781     int GetTotalDays() const;
1782
1783     /**
1784         Returns the number of weeks in this date span.
1785
1786         @see GetTotalDays()
1787     */
1788     int GetWeeks() const;
1789
1790     /**
1791         Returns the number of years in this date span.
1792     */
1793     int GetYears() const;
1794
1795     /**
1796         Returns a date span object corresponding to one month.
1797
1798         @see Months()
1799     */
1800     static wxDateSpan Month();
1801
1802     /**
1803         Returns a date span object corresponding to the given number of months.
1804
1805         @see Month()
1806     */
1807     static wxDateSpan Months(int mon);
1808
1809     /**
1810         Returns the product of the date span by the specified @a factor. The
1811         product is computed by multiplying each of the components by the
1812         @a factor.
1813
1814         @return A new wxDateSpan object with the result.
1815     */
1816     wxDateSpan Multiply(int factor) const;
1817     /**
1818         Multiplies this date span by the specified @a factor. The product is
1819         computed by multiplying each of the components by the @a factor.
1820
1821         @return A reference to this wxDateSpan object modified in place.
1822     */
1823     wxDateSpan& Multiply(int factor);
1824
1825     /**
1826         Changes the sign of this date span.
1827
1828         @see Negate()
1829     */
1830     wxDateSpan& Neg();
1831
1832     /**
1833         Returns a date span with the opposite sign.
1834
1835         @see Neg()
1836     */
1837     wxDateSpan Negate() const;
1838
1839     /**
1840         Sets the number of days (without modifying any other components) in
1841         this date span.
1842     */
1843     wxDateSpan& SetDays(int n);
1844
1845     /**
1846         Sets the number of months (without modifying any other components) in
1847         this date span.
1848     */
1849     wxDateSpan& SetMonths(int n);
1850
1851     /**
1852         Sets the number of weeks (without modifying any other components) in
1853         this date span.
1854     */
1855     wxDateSpan& SetWeeks(int n);
1856
1857     /**
1858         Sets the number of years (without modifying any other components) in
1859         this date span.
1860     */
1861     wxDateSpan& SetYears(int n);
1862
1863     /**
1864         Returns the difference of two date spans.
1865
1866         @return A new wxDateSpan object with the result.
1867     */
1868     wxDateSpan Subtract(const wxDateSpan& other) const;
1869     /**
1870         Subtracts the given wxDateSpan to this wxDateSpan and returns a
1871         reference to itself.
1872     */
1873     wxDateSpan& Subtract(const wxDateSpan& other);
1874
1875     /**
1876         Returns a date span object corresponding to one week.
1877
1878         @see Weeks()
1879     */
1880     static wxDateSpan Week();
1881
1882     /**
1883         Returns a date span object corresponding to the given number of weeks.
1884
1885         @see Week()
1886     */
1887     static wxDateSpan Weeks(int weeks);
1888
1889     /**
1890         Returns a date span object corresponding to one year.
1891
1892         @see Years()
1893     */
1894     static wxDateSpan Year();
1895
1896     /**
1897         Returns a date span object corresponding to the given number of years.
1898
1899         @see Year()
1900     */
1901     static wxDateSpan Years(int years);
1902
1903     /**
1904         Adds the given wxDateSpan to this wxDateSpan and returns the result.
1905     */
1906     wxDateSpan& operator+=(const wxDateSpan& other);
1907
1908     /**
1909         Subtracts the given wxDateSpan to this wxDateSpan and returns the
1910         result.
1911     */
1912     wxDateSpan& operator-=(const wxDateSpan& other);
1913
1914     /**
1915         Changes the sign of this date span.
1916
1917         @see Negate()
1918     */
1919     wxDateSpan& operator-();
1920
1921     /**
1922         Multiplies this date span by the specified @a factor. The product is
1923         computed by multiplying each of the components by the @a factor.
1924
1925         @return A reference to this wxDateSpan object modified in place.
1926     */
1927     wxDateSpan& operator*=(int factor);
1928
1929     /**
1930         Returns @true if this date span is different from the other one.
1931     */
1932     bool operator!=(const wxDateSpan& other) const;
1933
1934     /**
1935         Returns @true if this date span is equal to the other one. Two date
1936         spans are considered equal if and only if they have the same number of
1937         years and months and the same total number of days (counting both days
1938         and weeks).
1939     */
1940     bool operator==(const wxDateSpan& other) const;
1941 };
1942
1943
1944
1945 /**
1946     @class wxTimeSpan
1947
1948     wxTimeSpan class represents a time interval.
1949
1950     @library{wxbase}
1951     @category{data}
1952
1953     @see @ref overview_datetime, wxDateTime
1954 */
1955 class wxTimeSpan
1956 {
1957 public:
1958     /**
1959         Default constructor, constructs a zero timespan.
1960     */
1961     wxTimeSpan();
1962     /**
1963         Constructs timespan from separate values for each component, with the
1964         date set to 0. Hours are not restricted to 0-24 range, neither are
1965         minutes, seconds or milliseconds.
1966     */
1967     wxTimeSpan(long hours, long min = 0, wxLongLong sec = 0, wxLongLong msec = 0);
1968
1969     /**
1970         Returns the absolute value of the timespan: does not modify the object.
1971     */
1972     wxTimeSpan Abs() const;
1973
1974     /**
1975         Returns the sum of two time spans.
1976
1977         @return A new wxDateSpan object with the result.
1978     */
1979     wxTimeSpan Add(const wxTimeSpan& diff) const;
1980     /**
1981         Adds the given wxTimeSpan to this wxTimeSpan and returns a reference
1982         to itself.
1983     */
1984     wxTimeSpan& Add(const wxTimeSpan& diff);
1985
1986     /**
1987         Returns the timespan for one day.
1988     */
1989     static wxTimeSpan Day();
1990
1991     /**
1992         Returns the timespan for the given number of days.
1993     */
1994     static wxTimeSpan Days(long days);
1995
1996     /**
1997         Returns the string containing the formatted representation of the time
1998         span. The following format specifiers are allowed after %:
1999
2000         - @c H - Number of Hours
2001         - @c M - Number of Minutes
2002         - @c S - Number of Seconds
2003         - @c l - Number of Milliseconds
2004         - @c D - Number of Days
2005         - @c E - Number of Weeks
2006         - @c % - The percent character
2007
2008         Note that, for example, the number of hours in the description above is
2009         not well defined: it can be either the total number of hours (for
2010         example, for a time span of 50 hours this would be 50) or just the hour
2011         part of the time span, which would be 2 in this case as 50 hours is
2012         equal to 2 days and 2 hours.
2013
2014         wxTimeSpan resolves this ambiguity in the following way: if there had
2015         been, indeed, the @c %D format specified preceding the @c %H, then it
2016         is interpreted as 2. Otherwise, it is 50.
2017
2018         The same applies to all other format specifiers: if they follow a
2019         specifier of larger unit, only the rest part is taken, otherwise the
2020         full value is used.
2021     */
2022     wxString Format(const wxString& format = wxDefaultTimeSpanFormat) const;
2023
2024     /**
2025         Returns the difference in number of days.
2026     */
2027     int GetDays() const;
2028
2029     /**
2030         Returns the difference in number of hours.
2031     */
2032     int GetHours() const;
2033
2034     /**
2035         Returns the difference in number of milliseconds.
2036     */
2037     wxLongLong GetMilliseconds() const;
2038
2039     /**
2040         Returns the difference in number of minutes.
2041     */
2042     int GetMinutes() const;
2043
2044     /**
2045         Returns the difference in number of seconds.
2046     */
2047     wxLongLong GetSeconds() const;
2048
2049     /**
2050         Returns the internal representation of timespan.
2051     */
2052     wxLongLong GetValue() const;
2053
2054     /**
2055         Returns the difference in number of weeks.
2056     */
2057     int GetWeeks() const;
2058
2059     /**
2060         Returns the timespan for one hour.
2061     */
2062     static wxTimeSpan Hour();
2063
2064     /**
2065         Returns the timespan for the given number of hours.
2066     */
2067     static wxTimeSpan Hours(long hours);
2068
2069     /**
2070         Returns @true if two timespans are equal.
2071     */
2072     bool IsEqualTo(const wxTimeSpan& ts) const;
2073
2074     /**
2075         Compares two timespans: works with the absolute values, i.e. -2 hours
2076         is longer than 1 hour. Also, it will return @false if the timespans are
2077         equal in absolute value.
2078     */
2079     bool IsLongerThan(const wxTimeSpan& ts) const;
2080
2081     /**
2082         Returns @true if the timespan is negative.
2083     */
2084     bool IsNegative() const;
2085
2086     /**
2087         Returns @true if the timespan is empty.
2088     */
2089     bool IsNull() const;
2090
2091     /**
2092         Returns @true if the timespan is positive.
2093     */
2094     bool IsPositive() const;
2095
2096     /**
2097         Compares two timespans: works with the absolute values, i.e. 1 hour is
2098         shorter than -2 hours. Also, it will return @false if the timespans are
2099         equal in absolute value.
2100     */
2101     bool IsShorterThan(const wxTimeSpan& ts) const;
2102
2103     /**
2104         Returns the timespan for one millisecond.
2105     */
2106     static wxTimeSpan Millisecond();
2107
2108     /**
2109         Returns the timespan for the given number of milliseconds.
2110     */
2111     static wxTimeSpan Milliseconds(wxLongLong ms);
2112
2113     /**
2114         Returns the timespan for one minute.
2115     */
2116     static wxTimeSpan Minute();
2117
2118     /**
2119         Returns the timespan for the given number of minutes.
2120     */
2121     static wxTimeSpan Minutes(long min);
2122
2123     /**
2124         Returns the product of this time span by @a n.
2125
2126         @return A new wxTimeSpan object with the result.
2127     */
2128     wxTimeSpan Multiply(int n) const;
2129     /**
2130         Multiplies this time span by @a n.
2131
2132         @return A reference to this wxTimeSpan object modified in place.
2133     */
2134     wxTimeSpan& Multiply(int n);
2135
2136     /**
2137         Negate the value of the timespan.
2138
2139         @see Negate()
2140     */
2141     wxTimeSpan& Neg();
2142
2143     /**
2144         Returns timespan with inverted sign.
2145
2146         @see Neg()
2147     */
2148     wxTimeSpan Negate() const;
2149
2150     /**
2151         Returns the timespan for one second.
2152     */
2153     static wxTimeSpan Second();
2154
2155     /**
2156         Returns the timespan for the given number of seconds.
2157     */
2158     static wxTimeSpan Seconds(wxLongLong sec);
2159
2160     /**
2161         Returns the difference of two time spans.
2162
2163         @return A new wxDateSpan object with the result.
2164     */
2165     wxTimeSpan Subtract(const wxTimeSpan& diff) const;
2166     /**
2167         Subtracts the given wxTimeSpan to this wxTimeSpan and returns a
2168         reference to itself.
2169     */
2170     wxTimeSpan& Subtract(const wxTimeSpan& diff);
2171
2172     /**
2173         Returns the timespan for one week.
2174     */
2175     static wxTimeSpan Week();
2176
2177     /**
2178         Returns the timespan for the given number of weeks.
2179     */
2180     static wxTimeSpan Weeks(long weeks);
2181
2182     /**
2183         Adds the given wxTimeSpan to this wxTimeSpan and returns the result.
2184     */
2185     wxTimeSpan& operator+=(const wxTimeSpan& diff);
2186
2187     /**
2188         Multiplies this time span by @a n.
2189
2190         @return A reference to this wxTimeSpan object modified in place.
2191     */
2192     wxTimeSpan& operator*=(int n);
2193
2194     /**
2195         Negate the value of the timespan.
2196
2197         @see Negate()
2198     */
2199     wxTimeSpan& operator-();
2200
2201     /**
2202         Subtracts the given wxTimeSpan to this wxTimeSpan and returns the
2203         result.
2204     */
2205     wxTimeSpan& operator-=(const wxTimeSpan& diff);
2206 };
2207
2208
2209
2210 /**
2211     @class wxDateTimeHolidayAuthority
2212
2213     @todo Write wxDateTimeHolidayAuthority documentation.
2214
2215     @library{wxbase}
2216     @category{data}
2217 */
2218 class wxDateTimeHolidayAuthority
2219 {
2220 public:
2221
2222 };
2223