Clocks will fall back to standard time Sunday (Nov. 2), at 2 a.m. Smartphones with automatic date and time settings will make the change for users; but people with analog clocks and watches will have to manually set their timepieces back an hour. (We suggest making the adjustment before bed on Saturday night.)
Daylight saving time is different for the Northern and Southern Hemispheres. While the Northern Hemisphere begins daylight saving time between March and April and ends it between September and November, the Southern Hemisphere does the opposite.
While much of the United States observes DST, a few places (Hawaii and most of Arizona, for example) do not.
TimeandDate.com has a complete list of geographical locations that observe daylight saving time.