You've probably been wondering when it would be appropriate to turn back time ever since the days have started getting darker earlier—but now the day of clock reckoning has come! Daylight saving time for most of the U.S. ends at 2 a.m., which means 2 a.m. becomes 1 a.m. This is also a great time to change the batteries in your smoke and carbon monoxide detectors (here's the FDNY's pitch).

As for who kickstarted this, it was a Founding Father:

Ben Franklin—of "early to bed and early to rise" fame—was apparently the first person to suggest the concept of daylight savings, according to computer scientist David Prerau, author of the book Seize the Daylight: The Curious and Contentious Story of Daylight Saving Time.

While serving as U.S. ambassador to France in Paris, Franklin wrote of being awakened at 6 a.m. and realizing, to his surprise, that the sun would rise far earlier than he usually did. Imagine the resources that might be saved if he and others rose before noon and burned less midnight oil, Franklin—tongue half in cheek—wrote to a newspaper.

"Franklin seriously realized it would be beneficial to make better use of daylight but he didn't really know how to implement it," Prerau said.

A London-based time-management speaker and blogger, C.G.P. Grey, put together this video explaining the wackiness of DST:

Anyway, here's what you need to know: Turn your clocks back an hour and change the batteries in your smoke and CO detectors. And if you don't have smoke or CO detectors, your landlord should probably put them in.