From guy@netapp.com Wed Jan 17 21:58 PST 1996

...

Reported by Herbert Xu <herbert@greathan.apana.org.au>

PRC abandoned daylight saving in 1992 or 1993 but currently the files do not reflect this change.

The latest version of the time zone data files appear to reflect this:

# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S Rule Shang 1928 only - Jan 1 0:00 0 S Rule Shang 1940 only - Jun 3 0:00 1:00 D Rule Shang 1940 1941 - Oct 1 0:00 0 S Rule Shang 1941 only - Mar 16 0:00 1:00 D Rule PRC 1949 only - Jan 1 0:00 0 S Rule PRC 1986 only - May 4 0:00 1:00 D Rule PRC 1986 1991 - Sep Sun>=11 0:00 0 S Rule PRC 1987 1991 - Apr Sun>=10 0:00 1:00 D

although earlier versions didn't, I think (the files in SunOS 5.4 doesn't, for example, and they're probably based on an earlier version).

SunOS 5.4 (Solaris 2.4) zoneinfo files are taken from tzdata94d. There should be a patch available that will update this to tzdata95c (I think). We still need to update our zic to compile some of the latest zoneinfo files (like europe) as well as fix zdump, which we (I) :-( broke in 2.4. alan