Speculative theory
Daylight Saving TimeAtlas
Conventions & Standards · Timekeeping & calendars
The Standard Time Act established federal time standards in the United States and introduced daylight saving time during World War I. Common public claims about why daylight saving time was created or what it achieves are frequently disputed by historians and public-health researchers.
Open the caseInvolved
person
David S. Prerau
concept
Daylight Saving Time
location
Germany
organization
Library of Congress
government agency
National Institute of Standards and Technology
organization
Rutgers School of Public Health
document
Seize the Daylight
document
Standard Time Act
organization
U.S. National Archives
government agency
U.S. Naval Observatory
document
Uniform Time Act of 1966
government agency
United States Congress
On the map
Part of Time manipulation
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