Friday, March 12, 2010

Daylight Saving Time

For those of you in North American jurisdictions that observe Daylight Saving Time, don't forget to 'spring' your clocks forward one hour this Saturday night! Official time change occurs at 2:00 a.m. local time on Sunday, March 14th.

Starting in 2007, daylight time begins in North America on the second Sunday in March and ends on the first Sunday in November. On the second Sunday in March, clocks are set ahead one hour at 2:00 a.m. local standard time, which becomes 3:00 a.m. local daylight time. On the first Sunday in November, clocks are set back one hour at 2:00 a.m. local daylight time, which becomes 1:00 a.m. local standard time.

Not all places in the U.S. observe daylight time. In particular, Hawaii and most of Arizona do not use it. Indiana adopted its use beginning in 2006. In Canada, most of Saskatchewan, parts of Quebec, and Southampton Island in Nunavut do not observe daylight time.

Year   Begin        End
2007   March 11   November 4
2008   March 9     November 2
2009   March 8     November 1
2010   March 14   November 7
2011   March 13   November 6
2012   March 11   November 4
2013   March 10   November 3
2014   March 9     November 2
2015   March 8     November 1

Source: USNO and National Research Council Canada

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