The House approved legislation that would end twice-yearly clock changes and keep the United States on daylight saving time throughout the year. The 308-117 vote sends the long-running clock-change debate to the Senate, where geography, safety and implementation remain unresolved.

The House passed the measure 308-117 on Tuesday. The bill would establish year-round daylight saving time rather than permanent standard time. The proposal now goes to the Senate, where earlier versions have stalled.

States already have limited authority to remain on standard time, but they cannot independently adopt permanent daylight time. Implementation would require coordinated changes across transportation, schools, businesses and electronic systems. Sleep researchers often favor permanent standard time because morning light better aligns with human circadian rhythms. Supporters emphasize longer evening daylight and ending the disruption of seasonal clock changes.

A uniform national clock rule would alter morning light, evening activity, school schedules, transportation and health routines for nearly every household. The key policy choice is not simply whether to stop changing clocks; it is which clock should become permanent. Congress can eliminate a disruptive ritual while still choosing a configuration that creates new regional burdens, especially in western portions of time zones where winter sunrise already comes late.

The United States briefly tried year-round daylight time during the 1970s energy crisis before reversing course. House passage does not guarantee Senate approval, and the final effective date and treatment of states that already use standard time remain unsettled. The evidence standard here is to separate what reporting establishes, what officials or parties claim and what remains unresolved.

Watch whether Senate leaders schedule a vote before the end of the session. Watch for changes addressing school-morning darkness and state opt-outs. Those developments will determine whether today's announcement changes durable conditions or remains an incomplete first account.