X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/299fcbfe98fce39cdc9ab142b65824a175542ff2..78e848cac9c973346dcf598f3c1b942b63dd2821:/src/common/datetime.cpp

diff --git a/src/common/datetime.cpp b/src/common/datetime.cpp
index 10f35b10fb..d93cb2d179 100644
--- a/src/common/datetime.cpp
+++ b/src/common/datetime.cpp
@@ -553,9 +553,25 @@ wxDateTime& wxDateTime::Set(const struct tm& tm)
     struct tm tm2(tm);
     time_t timet = mktime(&tm2);
 
-    if ( timet == (time_t)(-1) )
+    if ( timet == (time_t)-1 )
     {
-        wxFAIL_MSG(_T("Invalid time"));
+        // mktime() rather unintuitively fails for Jan 1, 1970 if the hour is
+        // less than timezone - try to make it work for this case
+        if ( tm2.tm_year == 70 && tm2.tm_mon == 0 && tm2.tm_mday == 1 )
+        {
+            // add timezone to make sure that date is in range
+            tm2.tm_sec -= GetTimeZone();
+
+            timet = mktime(&tm2);
+            if ( timet != (time_t)-1 )
+            {
+                timet += GetTimeZone();
+
+                return Set(timet);
+            }
+        }
+
+        wxFAIL_MSG( _T("mktime() failed") );
 
         return ms_InvDateTime;
     }
@@ -688,6 +704,7 @@ wxDateTime::Tm wxDateTime::GetTm(const TimeZone& tz) const
         }
         else
         {
+            time += tz.GetOffset();
             tm = gmtime(&time);
         }
 
@@ -701,7 +718,7 @@ wxDateTime::Tm wxDateTime::GetTm(const TimeZone& tz) const
         // remember the time and do the calculations with the date only - this
         // eliminates rounding errors of the floating point arithmetics
 
-        wxLongLong timeMidnight = m_time - GetTimeZone() * 1000;
+        wxLongLong timeMidnight = m_time + tz.GetOffset() * 1000;
 
         long timeOnly = (timeMidnight % MILLISECONDS_PER_DAY).ToLong();