Daylight Savings Time, Leap Years, ctime, and date

[rja]

 From article <1006 at necis.UUCP>, by adamm at necis.UUCP (Adam Moskowitz):
 >   2) Does anyone know if the new versions are less naive about determining
 >      leap years? It seems the current routines only use the "year % 4 ==0"
 >      rule.
 
Fixed by POSIX as I recall.  (POSIX == IEEE 1003.1 standard in this case).