# Daylight saving time history and implementation > Developing situation record from CLSTR: https://clstr.news/situations/daylight-saving-time-history-and-implementation > Updated: 2026-11-09T07:00:00.000Z. Sources: 4. Developments: 2. The seasonal transition from daylight saving time to standard time has prompted discussions regarding the history, regulation, and biological impacts of clock shifts. Historical origins of the practice include suggestions attributed to Benjamin Franklin, though proposals by George Vernon Hudson in 1895 and William Willett are also noted. In the United States, the practice was regulated through various measures, including the Standard Time Act of 1918, the War Time Act of 1942, and the Uniform Time Act of 1966. A 1974 experiment with year-round daylight saving was repealed following reports of injuries and fatalities involving children in early morning darkness. Scientific research suggests these shifts can disrupt circadian rhythms and internal biological clocks, potentially leading to health consequences. While most of the United States follows a schedule established by a 2005 law, certain areas such as Hawaii and Arizona, excluding the Navajo Nation, remain exempt from these changes. ## Timeline ### 2026-11-09: Daylight saving time history and seasonal clock changes A look at the history of daylight saving time in the U.S., including legislative origins, the repeal of year-round DST, and the potential health impacts of disrupting circadian rhythms. 4 sources. https://clstr.news/cluster/daylight-saving-time-history-and-seasonal-clock-changes ### 2026-10-24: History and myths surrounding daylight saving time An examination of the origins of daylight saving time, debunking the myth of Benjamin Franklin's involvement and highlighting the actual contributions of George Vernon Hudson and William Willett. 2 sources. https://clstr.news/cluster/history-and-myths-surrounding-daylight-saving-time --- Cite as: Daylight saving time history and implementation. CLSTR, https://clstr.news/situations/daylight-saving-time-history-and-implementation