By: HISTORY.com Editors

1942

Daylight saving time instituted

Published: November 05, 2009Last Updated: May 27, 2025

Congress pushes ahead standard time for the United States by one hour in each time zone, imposing daylight saving time—called at the time “war time.”

The Origins of Daylight Savings Time

While Daylight Savings is fairly harmless today, it's origins lie in one of the most violent episodes of world history.

1:02m watch

Daylight saving time, suggested by President Roosevelt, was imposed to conserve fuel and could be traced back to World War I, when Congress imposed one standard time on the United States to enable the country to better utilize resources, following the European model.

The 1918 Standard Time Act was meant to be in effect for only seven months of the year—and was discontinued nationally after the war. But individual states continued to turn clocks ahead one hour in spring and back one hour in fall. The World War II legislation imposed daylight saving time for the entire nation for the entire year. It was repealed on Sept. 30, 1945, when individual states once again imposed their own “standard” time. It was not until 1966 that Congress passed legislation setting a standard time that permanently superseded local habits.

Timeline

Also on This Day in History

Discover more of the major events, famous births, notable deaths and everything else history-making that happened on February 9th

Advertisement
Advertisement
Advertisement
Advertisement
Advertisement
Advertisement
Advertisement
Advertisement
Advertisement

Related

World War II

159 videos

Allied military leaders knew that casualties could be staggeringly high. Historians are still calculating the toll.

An actual soldier named Fritz Niland was targeted to be saved by a U.S. War Department 'sole-survivor' directive designed to keep families from losing all of their sons.

On February 25, 1942, an infamous false alarm saw American military units unleash a torrent of anti-aircraft fire in the skies over Los Angeles.

About the author

HISTORY.com Editors

HISTORY.com works with a wide range of writers and editors to create accurate and informative content. All articles are regularly reviewed and updated by the HISTORY.com team. Articles with the “HISTORY.com Editors” byline have been written or edited by the HISTORY.com editors, including Amanda Onion, Missy Sullivan, Matt Mullen, Christian Zapata, Cristiana Lombardo and Adrienne Donica.

Fact Check

We strive for accuracy and fairness. But if you see something that doesn't look right, click here to contact us! HISTORY reviews and updates its content regularly to ensure it is complete and accurate.

Citation Information

Article Title
Daylight saving time instituted
Website Name
History
Date Accessed
March 27, 2026
Publisher
A&E Television Networks
Last Updated
May 27, 2025
Original Published Date
November 05, 2009