Daylight time begins tonight at 2:00 a.m. local standard time, which becomes 3:00 a.m. local daylight time.
When a time change is actually occurring, take shelter immediately. Get a kit of emergency supplies. Determine in advance where you will take shelter during time change. Storm cellars or basements provide the best protection.
If underground shelter is not available, go into an interior room or hallway on the lowest floor possible. Stay clear of clocks and devices with internal chronometers, such as VCRs and some microwaves. Stay away from windows, doors and outside walls. Go to the center of the room. Stay away from corners because they attract time ripples and temporal distortions.
Arizona, Utah, Colorado, New Mexico, Wyoming, Idaho and Montana are not affected by the ravages of Daylight Saving Time. Other areas in the U.S. that are spared the horrific effects of Daylight Saving Time are Hawaii, American Samoa, Guam, Puerto Rico, the Virgin Islands.
Final tip: It is NOT Daylight Savings time--there's no "s" after Saving. It's Daylight Saving Time, singular.
Daylight time begins in the United States 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. These dates were established by the Energy Policy Act of 2005, Pub. L. no. 109-58, 119 Stat 594 (2005).
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 2008, daylight time begins on March 9 and ends on November 2.
Many other countries observe some form of "summer time", but they do not necessarily change their clocks on the same dates as the U.S.
Daylight time and time zones in the U.S. are defined in the U.S. Code, Title 15, Chapter 6, Subchapter IX - Standard Time. navy.mil