Nokia E5-00 Daylight Savings Time update dilema

I live in Arizona where we don't have daylight savings time, my phone is set up to not change during this time and so everything stayed the same except one particular thing... my Calendar agenda entries all changed for the entire year, all of the agenda times just automatically changed to an hour earlier than what they were set up to. So as an example, my appointment this week which I have all year long every week just changed from 2:00 - 4:00pm to the new time of 1:00 -2:00pm WHAT THE HELL? Now I have to go into my calendar and change every single 200 entries I have for the entire year... that's just messed up!!!

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Is the calendar local to the phone? Is it synced with another calendar, like Exchange or Google?

East coast -- we have two lumia 900s. Time changed OK to DST, but all my calendar entries (synced w/hotmail) changed as well.

Turn off phone; Set web based calendar to desired DLS settings.
Turn on phone and sync calendar.

If that dosent work, Try this:
1.Press your device's < Home > button, then press < Menu >.
2.Select Settings.
3.Select Applications, then Manage applications. (Application Manager)
4.Select Calendar Storage.
Note: If you don't see 'Calendar Storage,' press < Menu > again, then select Filter > All. On some devices, you won't see 'Calendar Storage.' It is fine to ignore this step if it doesn't apply.
5.Select Clear data. Answer OK when prompted. reboot & sync
(Some calendar data on the device will be lost) See warning here:
source: Problems with sync - Google Calendar Help

many people face same problem like that