美國聯邦2007夏令時改變詳述

On August 8, 2005, President George W. Bush signed the Energy Policy Act of 2005. This Act changed the time change dates for Daylight Saving Time in the U.S. Beginning in 2007, DST will begin on the second Sunday in March and end the first Sunday in November.

此項改變會在計算機技術方面引起相應的改變。