Prepare for an extra hour of sleep – at least for one day.

Daylight Saving Time (note there are no ‘s at the end of the time savings) officially ends at 2:00 AM on Sunday, November 5. From that point on, we turn our clocks back one hour, which means there will be more daylight in the morning hours and less in the evening.

After we “fall back,” we will remain on standard time until the second Sunday in March, which is March 16, 2025, when we return to Daylight Savings Time. The transition to standard time occurs each year on the first Sunday in November at 2:00 a.m.

According to the National Institute of Standards and Technology, DST was formally introduced in the U.S. in 1918 as an energy-saving measure intended to provide more daylight during times when people were outdoors. It was discontinued after World War I, but was not reinstated until World War II. After the war, local jurisdictions were free to determine whether to observe DST and what dates to use. The dates for DST and standard time have changed several times throughout history, most recently in 2007 when the Energy Policy Act of 2005 extended the duration of DST by one month in an effort to reduce energy consumption.

Daylight Saving Time is now in effect for 238 days, about 65% of the year. Standard Time is 127 days, or 35%.

In recent years, the process of changing time has become increasingly controversial and there have been attempts – so far all unsuccessful – to abolish the practice.

Not all states observe Daylight Savings Time or changing the clocks. Parts of Arizona that are not part of the Navajo Nation, Hawaii, and the U.S. territories of American Samoa, Guam, the Northern Mariana Islands, Puerto Rico, and the U.S. Virgin Islands do not observe the time change.