logo

Video encyclopedia

09/02/1942 Daylight-saving "war time" goes into effect in USA

1:10

War Time (Daylight Saving Time)

1:05

Daylight Savings, Taxes & Liberty Bonds

2:20

Daylight Saving Time 101 | National Geographic

1:43

What Neil Thinks About Daylight Saving Time | StarTalk

2:34

Why We Have Daylight Saving Time

DST became a local option and was observed in some states until World War II when President Franklin Roosevelt instituted year-round DST, called "War Time". It lasted until the last Sunday in September. After that many states and cities east of the Mississippi River adopted summer DST.
    • Essentials 

    • History of DST in the United States 

    • Procedure for modifications 

    • Local DST observance