Ok. So Paul Revere didn't ride through the streets saying the "the clocks are changing, the clocks are changing", but he might if he was riding through the streets next Saturday night.
When: Next Sunday, the 8th of March is the day of the annual ritual known by the catch phrase, "Spring Forward" when Daylight Saving Time begins.
Daylight saving time and the time zones were enacted by the Act of March in 1918. A year later it was repealed until World War II when the country was trying to save every spare dime and kilowatt for the war effort. It was reintroduced and was used until September 1945 when states and localities were given the choice. In 1966 the Standard Time Act changed that and we have had DST ever since. Until 2007 the days were the first Sunday in April and the last Sunday in October.
On August 8, 2005, President Bush signed into law an energy bill that extended DST by 4 weeks each year. The bill moved the start of DST up 3 weeks to the 2nd Sunday in March and the ending a week later to the 1st Sunday in November. This year the end of DST will be November 1.
Hawaii and Arizona do not change to DST.
If you are like me and would like to know more about the history of it go to US Navy UNSO site at: http://aa.usno.navy.mil/faq/docs/daylight_time.php

