Solaris 2.2 seems based on a particularly ancient version of the timezone code. It has many bugs that, near as I can tell, were fixed as long ago as 1989 in the public domain version. This is a real step backwards from SunOS 4.1.x. The most serious bug will occur on October 24, 1993 in GB-Eire: Solaris 2.2's switch from summer to winter time will be delayed until October 31. There are some other bugs in Australia, Brazil, Chile, Israel, and Korea zones. I just filed an official bug report with Sun, but I don't have much hope of it having an effect in time. Perhaps someone with some influence at Sun can get them to upgrade to the latest tz code before Solaris 2.3 comes out. Or I could just post a note to comp.risks...