Brian Handwerk
for National Geographic News
Updated November 3, 2011

With daylight saving time (also called daylight savings) about to end again, clock confusion is once again ticking away: When exactly does daylight saving time end? Why do we fall back? Does it really save energy? Is it bad for your health? Get expert answers below.

When Does Daylight Savings End in 2011?

For most Americans, daylight saving time 2011 ends at 2 a.m. on Sunday, November 6, 2011, when most states fall back an hour. Time will spring forward to daylight saving time again on Sunday, March 11, 2012, when daylight saving time begins again.

The federal government doesn’t require U.S. states or territories to observe daylight saving time, which is why residents of Arizona, Hawaii, Puerto Rico, the Virgin Islands, American Samoa, Guam, and the Northern Marianas Islands won’t need to change their clocks this weekend.

Where it is observed, daylight savings has been known to cause some problems.

National surveys by Rasmussen Reports, for example, show that 83 percent of respondents knew when to move their clocks ahead in spring 2010. Twenty-seven percent, though, admitted they’d been an hour early or late at least once in their lives because they hadn’t changed their clocks correctly.

It’s enough to make you wonder—why do we do use daylight saving time in the first place?

(Source: National Geographic)

1. kittiekami reblogged this from nationalgeographicmagazine
2. kisstheinfinite501 reblogged this from nationalgeographicmagazine
3. rememorari reblogged this from lightnurlicht
4. lightnurlicht reblogged this from nationalgeographicmagazine
5. dannysaurusrex reblogged this from nationalgeographicmagazine
6. bluntbros liked this
7. rmiwan reblogged this from nationalgeographicmagazine
8. experiencethewarmth liked this
9. p0rkfatrules liked this
10. bherms reblogged this from nationalgeographicmagazine
11. oofoofoofoofoofoofbaha reblogged this from nationalgeographicmagazine and added:

    My parents and I made plans...movies today, but apparently

12. 0bstacles liked this
13. fionaelle reblogged this from nationalgeographicmagazine
14. suhmuhdui liked this
15. theguidance reblogged this from nationalgeographicmagazine
16. dartharaiz liked this
17. mzzjane reblogged this from nationalgeographicmagazine
18. jarofjelly liked this
19. sleepyheathen liked this
20. curvedcurvis reblogged this from nationalgeographicmagazine
21. andthatsmile liked this
22. wentforthproceed reblogged this from nationalgeographicmagazine
23. letsgotothepark liked this
24. cnuwho liked this
25. laviesupernova reblogged this from nationalgeographicmagazine
26. xxcxme liked this
27. scythianlingo reblogged this from sametraveller
28. sametraveller liked this
29. tomboylovesmakeup liked this
30. everydayescape liked this
31. chichimaru reblogged this from nationalgeographicmagazine
32. breathinginndeep liked this
33. breathinginndeep reblogged this from nationalgeographicmagazine
34. lifehappenswhenyoublink reblogged this from nationalgeographicmagazine and added:

    just let your cellphone be your guide.

35. sametraveller reblogged this from nationalgeographicmagazine
36. spellandspill liked this
37. thejaundice reblogged this from nationalgeographicmagazine and added:

    me tonight. It was weird telling her

38. sseebode liked this
39. ohitsjustjacky reblogged this from nationalgeographicmagazine
40. breadandcircus reblogged this from ravenclawkeeper
41. ravenclawkeeper reblogged this from nationalgeographicmagazine
42. owlssaymai liked this
43. peanutbutterjamjam reblogged this from nationalgeographicmagazine
44. coffeeatmidnight liked this
45. fionaelle liked this
46. totesdef reblogged this from nationalgeographicmagazine
47. jmdj liked this
48. captainspaniard reblogged this from nationalgeographicmagazine
49. flyboats liked this
50. thesecondgleam liked this
51. Show more notesLoading...