Like most states in the U.S., Daylight Saving Time is
observed in Alaska, where the time is shifted forward by 1 hour, resulting
in an 8 hours difference behind Greenwich Mean Time (GMT-8).
After the Summer months the time is shifted back by 1
hour resulting in the normal 9 hours difference behind GMT.
USA & Canada clocks
Daylight Saving Time dates 2012
Sunday 11 March 2012 2am local time
until Sunday 4 November 2012 2am local time
see: Daylight-Saving-Time.com
for details
USA and Canada Standard Time Date schedules
here