Washington D.C. - At 2 a.m. on Sunday, Nov. 4, most U.S. residents will be moving their clocks back an hour to mark the end of Daylight Saving Time.
Yes, that's right: Clock confusion is upon us yet again.
Not all states, however, will observe the time change. Residents of Arizona, Hawaii and U.S. territories like Puerto Rico, Guam and the Virgin Islands will remain on their normal schedules.
According to TimeandDate.com, about 75 countries and territories have at least one location that observed Daylight Saving Time this year and will be implementing the changeover this fall. However, the website notes that "countries, territories and states sometimes make adjustments that are announced just days or weeks ahead of the change."
In the U.S., the upcoming time shift is part of a longstanding tradition in which most residents set their clocks ahead an hour in the spring ("spring forward") and turn them back an hour as winter approaches ("fall back").
This means that come Sunday morning on Nov. 4, many U.S. residents will have had an extra hour of shut-eye.