Have You Heard? | History & Evergreen
Twice a year, millions of Americans adjust their clocks, moving one hour forward in spring and one hour backward in fall. But have you ever wondered who started this tradition, why it was introduced, and how it became part of American life?
The surprising answer involves a world war, efforts to conserve fuel, and more than a century of disagreement over how people should organize their days.
Did Benjamin Franklin Invent Daylight Saving Time?
Benjamin Franklin is often credited with inventing daylight saving time, but that description is misleading.
In 1784, Franklin wrote a humorous essay suggesting that people could save money on candles by waking earlier and taking advantage of morning sunlight.
However, Franklin did not propose the modern system of changing clocks twice a year.
More recognizable proposals came later. New Zealand entomologist George Vernon Hudson advocated seasonal clock changes in 1895, while British builder William Willett promoted a similar idea in the early 1900s.
World War I Changed Everything
The modern history of daylight saving time took a major turn during World War I.
On April 30, 1916, Germany and Austria-Hungary introduced daylight saving time as part of wartime efforts to conserve resources, particularly fuel used for artificial lighting.
By moving clocks forward, governments hoped people would make greater use of evening sunlight and reduce energy consumption.
Other European nations soon introduced similar measures.
America Adopted Daylight Saving Time in 1918
The United States officially adopted daylight saving time through the Standard Time Act, signed into law on March 19, 1918.
The legislation also established federal standard time zones, helping coordinate transportation and commerce across the country.
Daylight saving time was promoted as a wartime conservation measure, but it quickly became controversial.
Many farmers objected because agricultural work followed sunlight and seasonal conditions rather than the clock. Changing official time did not change when animals needed feeding or crops needed tending.
Congress repealed the national daylight saving requirement in 1919, although some cities and communities continued using it independently.
World War II Brought Back Nationwide Clock Changes
During World War II, the United States once again adopted a nationwide clock adjustment.
Beginning in February 1942, clocks were advanced one hour under a policy commonly known as War Time.
The measure remained in effect until September 1945.
After the war, states and local governments resumed following different schedules, creating confusion for transportation companies, broadcasters, and businesses operating across multiple communities.
The Uniform Time Act of 1966
To reduce confusion, Congress passed the Uniform Time Act of 1966.
The law established a national framework for the beginning and ending dates of daylight saving time while allowing states to exempt themselves from the practice.
It did not require every state to observe daylight saving time.
Today, Hawaii and most of Arizona remain on standard time throughout the year, along with several U.S. territories.
America Tried Year-Round Daylight Saving Time in the 1970s
During the energy crisis of the 1970s, the United States experimented with extended daylight saving time in hopes of reducing energy consumption.
A temporary year-round daylight saving policy began in January 1974.
However, dark winter mornings generated public concern, especially regarding children traveling to school before sunrise.
Congress shortened the experiment, and seasonal clock changes eventually returned.
Why Do Americans Still Change Their Clocks?
The Energy Policy Act of 2005 extended the daylight saving period, with the updated schedule taking effect in 2007.
Under current federal rules, daylight saving time begins on the second Sunday in March and ends on the first Sunday in November.
Supporters argue that additional evening daylight can benefit recreation, shopping, and other activities.
Critics point to sleep disruption, darker winter mornings under permanent daylight saving time, and mixed evidence about energy savings.
Sleep and medical organizations have also raised concerns about the effects of seasonal time changes on human circadian rhythms.
The Debate Continues More Than 100 Years Later
What began as an effort to conserve wartime resources has evolved into a national discussion about health, convenience, economics, and the best use of daylight.
Some Americans favor permanent daylight saving time. Others prefer permanent standard time. Still others support keeping the seasonal system.
One thing is clear: changing the clocks has never been universally popular.
More than a century after the United States first adopted daylight saving time, the country is still debating whether the practice should continue.
Have You Heard? Sometimes the most familiar parts of everyday life have the most surprising histories.
Sources & Further Reading
- National Institute of Standards and Technology — Daylight Saving Time
- U.S. Department of Transportation — Uniform Time
- U.S. Naval Observatory — Daylight Saving Time
- National Archives — Standard Time Act
- Library of Congress — Historical Collections