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March 1, 2025 |

A Short History of Daylight Savings Time and a Quick Reminder

Spring forward, fall back. That’s how the U.S. has observed daylight saving time (DST) since 1966. But why do we adjust our clocks twice a year? It all started with a scientist who wanted more daylight hours to search for insects.

Daylight saving’s origins
No, Ben Franklin didn’t invent DST, but the widespread myth does have some footing. In 1784, Franklin suggested that people should rise with the sun to replace expensive candle use with free morning light. The idea for changing clocks didn’t come until 1895 when George Hudson, a New Zealand entomologist, came up with a two-hour time shift so he could do more bug hunting after work in the summer.

Seven years later, William Willett proposed the idea — advancing clocks in April and reversing them in December — to England’s Parliament, which rejected it. Willett continued to fight for the change until his death in 1915.

It’s about time
Trying to save energy during World War I, the German government followed Willett’s suggestions and adopted the time change in 1916. England, France, and other countries that fought in the war quickly followed suit — including the United States on March 9, 1918. The change came with the Standard Time Act, which also instituted standard time.

But DST didn’t come easily everywhere. Joseph Stalin implemented the time change in the Soviet Union in the spring of 1930, but he forgot to remind people to reverse the clocks in October, making clocks in Russian time zones off by an hour for 61 years.

America changes clocks
It didn’t initially stick in the U.S., either. The DST portion of the Standard Time Act was repealed in 1919, overriding a veto by President Woodrow Wilson. But that wasn’t the end of DST. Some cities, including New York and Chicago, continued to turn their clocks forward and back after the repeal, confusing travelers for years.

President Franklin Roosevelt reinstituted year-round DST on February 9, 1942, to make the most of daylight hours during World War II. But after the law expired at the end of the war in 1945, states and cities once again set their own timekeeping rules. By the 1960s, localities in Iowa had more than 20 different pairs of start and end dates for DST.

The country came back together with the Uniform Time Act of 1966; DST officially began on the last Sunday of April and ended on the last Sunday of October. The law was revised in 1972 and overridden by the Emergency Daylight Saving Time Energy Conservation Act in 1973.

Dates returned to normal after 1975 until a 1986 revision added three more weeks of DST. Finally, the Energy Policy Act of 2005 extended DST starting in 2007, and since then, we’ve sprung forward on the second Sunday of March and fallen back on the first Sunday of November.

About 30% of countries don’t observe DST, and even more are divided within their borders. In the U.S., Hawaii and parts of Arizona don’t change their clocks, and other states can exempt themselves from federal laws.

What this means for you
Springing forward and falling also serve as excellent reminders to check your batteries in smoke and carbon monoxide detectors. Switching out old batteries for fresh ones twice yearly is an ideal way to safeguard your family. It is also a great time to replace that filter in your HVAC system to ensure optimal performance and energy savings.