Samsung’s smart phones are said to have all kinds of weird issues in regards to Daylight Saving Time(DST) - in case you own a BlackJack or a Samsung Ace(and feel like trying out an unofficial patch), please head over to the-unwired and download their CAB:
http://www.theunwired.net/?item=fix-samsung-blackjack-blackjack-ii-and-ace-leap-year-calendar-patch-available

By the way, this also fixes the calendar displayed on the home page of the device…

Should you get it up and running, please let us know!