I posted a question earlier about a problem with exporting TZ, which was caused by a typo in the timezone man page on my ubuntu 10.10 system. When the typo was fixed the daylight savings end worked correctly. I've been given a new test in which one case seem to show a problem of when daylight savings starts, and one case when daylight savings ends. When a timezone is defined as : export TZ="NZST-23:00:00NZDT-24:00:00,M10.1.0,M3.3.0" the time is set one hour ahead when daylight savings begins. When I define a timezone with export TZ="NZST-12:00:00NZDT-13:00:00,M10.1.0,M3.3.0" there is no change in time when daylight savings ends. Is this a known problem? Or a problem with how the timezones are defined? I'll attach the test case. thanks Dave