10/19/2026
Canadian researchers reviewed existing evidence and concluded permanent standard time is healthier than permanent daylight saving time. In July 2026, the U.S. House of Representatives passed a bill making daylight saving time permanent nationwide, and it now sits before the Senate. Major sleep and body-clock research societies have all called for permanent standard time instead. A 2025 computer simulation found that both permanent options beat clock changes for health, but permanent daylight saving time’s benefits were a third lower than permanent standard time’s. One analysis of U.S. time zones found that an hour of later sunset cut weekly sleep by nearly an hour and long-term earnings by about 5%. In Florida, an extra hour of sunlight before school was linked to higher math and reading scores among teens. Japan, South Korea, and most of Mexico already use permanent standard time.