Purpose: to discuss items known as ''calendar'' in the [Tcl] world.

Unfortunately, this name is used both as a widget that is part of [incr Widgets]
as well as a package in tcllib.

[http://incrtcl.sourceforge.net/iwidgets/iwidgets/calendar.gif]

Docs for the iwidgets widget can be found at http://incrtcl.sourceforge.net/iwidgets/iwidgets/calendar.html and http://purl.org/tcl/home/man/iwidgets3.0/calendar.n.html

[GWM] Note that the iwidgets calendar uses the same date formula as used by Unix. This uses a 4 byte integer to specify seconds since 1900 (or 1901 maybe). Attempts to move a calendar widget beyond 2027/28 results in the integer overflowing, and the calendar fails, sometimes catastrophically. This needs to be addressed in the next 24 years, in the short term a calendar does not need second precision (time does of course). So I think best would be to use 2 variables - the day (from which year can be derived)and seconds of day (perhaps with millisecond or microsecond precision). Both these values could be held in 4 byte integers.

The [tcllib] group of modules contains some calendar support code.  It does not yet have any reference docs though.

[tcllib calendar module] has a number of calendar printing functions, similar to the unix "cal" command.  Despite the name of this page, it is not actually part of the tcllib.

[BLT] comes with a calendar example and efftcl has a calendar example. ''BLT comes with a calendar example? Where would that be found?''
----
[Category Command], a part of [incr Widgets]
[Category Package], subset [Tcllib]