Here is a friendly Photoblog reminder to turn back those clocks tonight so you don't end up at your Sunday morning brunch date an hour early. To learn more about resetting your biological clock, click here, and to see where you might find some of the world's most famous clocks, click here.

Charlie Riedel / AP
Custodian Ray Keen checks the time on a clock face after changing the time on the 97-year-old clock atop the Clay County Courthouse, Saturday, Nov. 6, in Clay Center, Kan. Keen was setting time back in advance of the end of daylight savings time which occurs at 2 a.m. on Sunday.