\membersection{wxDateTime::GetTmNow}\label{wxdatetimegettmnow}
-\func{static struct tm *}{GetTmNow}{\void}
+\func{static struct tm *}{GetTmNow}{\param{struct tm *}{tm}}
+
+Returns the current time broken down, uses the buffer whose adress is
+passed to the function via {\it tm} to store the result.
-Returns the current time broken down.
+\membersection{wxDateTime::GetTmNow}
+
+\func{static struct tm *}{GetTmNow}{\void}
+Returns the current time broken down. Note that this function returns a
+pointer to a static buffer that's reused by calls to this function and
+certain C library functions (e.g. localtime). If there is any chance your
+code might be used in a multi-threaded application, you really should use
+the flavour of function \helpref{wxDateTime::GetTmNow}{wxdatetimegettmnow}
+taking a parameter.
\membersection{wxDateTime::GetWeekDayName}\label{wxdatetimegetweekdayname}
equivalently, the first week which has Thursday in this year. Both of these
definitions are the same as saying that the first week of the year must contain
more than half of its days in this year. Accordingly, the week number will
-always be in $1\ldots53$ range ($52$ for non leap years).
+always be in $1\ldots53$ range ($52$ for non-leap years).
The function depends on the \helpref{week start}{wxdatetime} convention
specified by the {\it flags} argument but its results for