Daylight Saving Time for 2009 ends this Sunday, November 1 at 2:00 am (in tango terms, this is late night on October 31). At 2:00 am, turn your clocks back to 1:00 am and enjoy an extra hour of whatever you were doing at 2:00 am.
For an explanation of why we even do this, check out this article on the National Geographic website.