General :: DST Time Change For Positive Timezones Not Working?

I was doing some testing which is required for some of my products

Here is the strange behaviour i observed

First i did set the timezone to PST 2010 (which is less than GMT basically negative timezone)

zdump -v /etc/localtime |grep 2010
/etc/localtime Sun Mar 14 09:59:59 2010 UTC = Sun Mar 14 01:59:59 2010 PST isdst=0 gmtoff=-28800
/etc/localtime Sun Mar 14 10:00:00 2010 UTC = Sun Mar 14 03:00:00 2010 PDT isdst=1 gmtoff=-25200

[Code]....

Note:in the above case when i did set time to 2:59:55 and said ok by then CEST became CET already. That could be the reason why DST is not happening.

I tried with few other positive and negative timezone configuration all the negative time zones resets back properly where as all the positive timezones doesn't

All my timezone files are up to date,i am using fedora 9