Daylight Saving Time: A History and Current Debate

If you’re feeling extra cranky today, it might be because of the switch to daylight saving time, which occurred overnight, giving us an extra hour of sunlight in the afternoon but costing us an hour of sleep. The debate over whether to retain changing the clocks continues, with a complex history and ongoing discussion.

A History Rooted in Energy Conservation

The concept of daylight saving time (DST) often gets attributed to Benjamin Franklin. However, as experts note, Franklin didn’t actually invent DST. In 1784, while living in Paris, he wrote a satirical essay suggesting Parisians adjust their schedules to save money on candles. He observed that waking earlier with the sun could reduce the need for artificial light.

The modern practice of DST originated in Germany during World War I in 1916, as an energy-saving measure. The United States followed suit in 1918 . It wasn’t about maximizing daylight, but about conserving energy during wartime.

Current Status and Ongoing Debate

Currently, most of the U.S. Observes DST, which begins on the second Sunday in March and lasts until the first Sunday in November. However, there are exceptions: Hawaii and Arizona (with the exception of the Navajo Nation) do not observe DST .

There are three main options being considered: year-round DST, year-round standard time, or continuing the current system of switching twice a year. According to DST expert David Prerau, the current system is “the best of both” .

In the early 1970s, the U.S. Briefly experimented with year-round DST in response to an energy crisis, but Congress repealed the law before the two-year period ended. More recently, the Senate passed the Sunshine Protection Act (S-623) in 2021 to make DST permanent, but the bill stalled in the House of Representatives .

California has also been considering changes. A 2024 bill (SB 1197) proposed shifting to permanent standard time, citing concerns about the disruptive effects of changing clocks on health, safety, and education . The National Sleep Foundation supports adopting permanent standard time to prioritize sleep health .

The Impact on Health and Well-being

The twice-yearly time change can have negative consequences for health. Experts like Jamie M. Zeitzer at Stanford University have highlighted that the spring transition can lead to sleep loss and an increased risk of accidents and cardiovascular issues . However, Zeitzer notes that these risks are similar to those experienced when traveling across time zones.

there is no universally preferred system. Preferences often shift with the seasons, with people generally favoring standard time in the winter and DST in the summer .

As most Californians adjust to running on an hour less sleep today, it’s a reminder of the ongoing debate and the complexities surrounding daylight saving time.