Daylight Savings Change in the U.S. 2007

It has been a difficult task in the digital world as the clocks either synchronize correctly or incorrectly due to the new law passed by President Bush.

…Starting in 2007, Daylight Saving Time (DST) begins each year at 2:00 a.m. (local time) on the second Sunday in March in most of the United States and its territories. Clocks must be moved ahead one hour when DST goes into effect. DST is not observed in Hawaii, American Samoa, Guam, Puerto Rico, the Virgin Islands and the state of Arizona (with the exception of the Navajo Indian Reservation, which does observe DST).

Standard Time begins each year at 2:00 a.m. (local time) on the first Sunday of November. Move your clocks back one hour at the resumption of Standard Time.

In 2007, DST begins at 2:00 a.m. (local time) on March 11, 2007.

In 2007, DST ends at 2:00 a.m. (local time) on November 4, 2007.

The current Daylight Saving Time rules represent a change from the past. On August 8, 2005, President Bush signed the Energy Policy Act of 2005, which included the changes in Daylight Saving Time described above, effective in 2007. Prior to 2007, DST began at 2:00 a.m. (local time) on the first Sunday in April, and ended at 2:00 a.m. (local time) on the last Sunday in October. The new rules for DST beginning in 2007 mean an extra four or five weeks of DST each year. There will now be a total of 238 days of DST, compared to a total of 210 days of DST in 2006 under the previous rules, and the U. S. will remain on DST for about 65% of the year… (source)

References:
NIST Time and Frequency FAQ
Information about WWVB Radio Controlled Clocks
Microsoft’s Help and Support Regarding
Apple’s Daylight Savings Time change in 2007
Energy Policy Act of 2005
Major IT vendor links from edgeblog