Spring forward this weekend as we turn clocks and watches ahead one hour at 2 a.m. Sunday March 9 to start daylight time.
But daylight time hasn’t always been one hour ahead.
Throughout history there have been several variants, such as half adjustment (30 minutes) or double adjustment (two hours), and adjustments of 20 and 40 minutes have also been used.
A two-hour adjustment was used in several countries during the 1940s and other places at times.
Sometimes daylight time is used for longer than just the summer, as it was in the U.S. during the Second World War.
From February 3, 1942 to September 30, 1945, most of the states had daylight time all year in what was called “War Time.”
Other countries that begin daylight time this year on the same date include Bermuda, Cuba, some areas in Greenland, St. Pierre and Miquelon, the Bahamas, Turks and Caicos Islands and Uruguay.
With files from timeanddate.com.