Daylight saving time Timeline of Events

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Daylight saving time

Daylight saving time —also summer time in several countries including in British English and European official terminology —is the practice of temporarily advancing clocks during the summertime so that afternoons have more daylight and mornings have less...

Timeline of Events

1918

3.19.1918

The U.S. Congress establishes time zones and approves daylight saving time.

3.31.1918

Daylight saving time goes into effect in the United States for the first time.

1942

2.9.1942

Year-round Daylight saving time is re-instated in the United States as a wartime measure to help conserve energy resources.

1974

1.6.1974

In response to the 1973 energy crisis, daylight saving time commences nearly four months early in the United States.

1981

4.1.1981

Daylight saving time is introduced in the USSR.