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Day light saving time begins in the United States on the second Sunday in March and ends on the first Sunday in November. On Day Light Saving Time start day, be sure to move your clocks forward by 1 hour (in theory, it should be set at 2:00 AM local time to 3:00 AM). […]

Day Light Saving Time Ends on Sunday, November 6, 2011. Be sure to move your clocks back by 1 hour.

Reference: Naval Oceanography Portal