From Wikipedia's Daylight savings time article:

Starting in 2007, most of the United States and Canada observe DST from the second Sunday in March to the first Sunday in November, almost two-thirds of the year.

See also http://webexhibits.org/daylightsaving/b.html, the first thing Google comes up with in a search for "daylight savings".

In reply to Re^4: Using timelocal function by kyle
in thread Using timelocal function by rpike

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