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United States and Canada: Daylight Saving Time Extended Starting 2007

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Published 1-Mar-2007

Starting in 2007, the United States and Canada will start Daylight Saving Time (DST) on the second Sunday of March and end on the first Sunday of November.

United States and Canada: Daylight Saving Time Extended Starting 2007

Daylight saving time is extended in the United States and Canada.

©iStockphoto.com/Gordana Sermek

From 1987 to 2006, DST began on the first Sunday in April and ended on the last Sunday of October. This year, the start date is three or four weeks earlier and the end date is one week later, making Daylight Saving Time a total of four or five weeks longer. In 2007, DST will last four weeks longer than it had previously; in 2008, it will be five weeks longer. If the extension is not successful, the United States might make the decision to revert to the old changeover dates. The amendment for United States is described here: Energy Policy Act 2005.

34 Weeks of Daylight Saving Time

Previously, the number of weeks of Daylight Saving Time was not constant, depending on how early or late the first Sunday in April and last Sunday in October appeared. Since March and November of any given year always start on the same weekday, the duration of DST will now be the same every year. Standard time will be 18 weeks most years, and 19 weeks every fifth or sixth year.

Longest Period of Daylight Saving Time in the World

Most countries in Europe observe Daylight Saving Time from the last Sunday in March to the last Sunday in October, and in recent years Europe typically has had the longest DST period in the world. The new changeover dates for the United States and Canada means that DST will last three or four weeks longer in those countries than in Europe.

Other Locations Changing March 11, 2007

These locations will also start DST on March 11:

Daylight Saving Time Started Early in 1974 and 1975

In 1974, Daylight Saving Time started early in United States, on January 6, following the Emergency Daylight Saving Time Energy Conservation Act of 1973. The plan was to have the United States in year-round Daylight Saving Time for two consecutive years, but it was later amended so that there was standard time between October 27, 1974, and February 23, 1975.

Dates of Daylight Saving Time 1970–2015

These are the dates Daylight Saving Time started and ended in most of the United States and the planned dates until 2015. There is a chance that future dates will change. Also, note that some locations do not observe DST, but those locations that do should use these common start and ending dates. Occasionally locations have changed their clocks on other dates.


YearStart dateEnd dateDaylight duration
1970Apr 26Oct 2526 weeks
1971Apr 25Oct 3127 weeks
1972Apr 30Oct 2926 weeks
1973Apr 29Oct 2826 weeks
1974Jan 6Oct 2742 weeks
1975Feb 23Oct 2635 weeks
1976Apr 25Oct 3127 weeks
1977Apr 24Oct 3027 weeks
1978Apr 30Oct 2926 weeks
1979Apr 29Oct 2826 weeks
1980Apr 27Oct 2626 weeks
1981Apr 26Oct 2526 weeks
1982Apr 25Oct 3127 weeks
1983Apr 24Oct 3027 weeks
1984Apr 29Oct 2826 weeks
1985Apr 28Oct 2726 weeks
1986Apr 27Oct 2626 weeks
1987Apr 5Oct 2529 weeks
1988Apr 3Oct 3030 weeks
1989Apr 2Oct 2930 weeks
1990Apr 1Oct 2830 weeks
1991Apr 7Oct 2729 weeks
1992Apr 5Oct 2529 weeks
1993Apr 4Oct 3130 weeks
1994Apr 3Oct 3030 weeks
1995Apr 2Oct 2930 weeks
1996Apr 7Oct 2729 weeks
1997Apr 6Oct 2629 weeks
1998Apr 5Oct 2529 weeks
1999Apr 4Oct 3130 weeks
2000Apr 2Oct 2930 weeks
2001Apr 1Oct 2830 weeks
2002Apr 7Oct 2729 weeks
2003Apr 6Oct 2629 weeks
2004Apr 4Oct 3130 weeks
2005Apr 3Oct 3030 weeks
2006Apr 2Oct 2930 weeks
2007Mar 11Nov 434 weeks
2008Mar 9Nov 234 weeks
2009Mar 8Nov 134 weeks
2010Mar 14Nov 734 weeks
2011Mar 13Nov 634 weeks
2012Mar 11Nov 434 weeks
2013Mar 10Nov 334 weeks
2014Mar 9Nov 234 weeks
2015Mar 8Nov 134 weeks

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