President Donald Trump has voiced support for legislation that would make daylight saving time permanent in the United States, ending the practice of changing clocks twice a year. The House bill, which Trump praised publicly, would lock the country into the longer-evening schedule year-round rather than reverting to standard time each fall.

The push to end clock changes is not new — Congress has debated the issue for years, and a similar measure passed the Senate unanimously in 2022 before stalling in the House. Trump's backing gives the current effort a higher political profile and could help accelerate its progress through the legislature.

Supporters of permanent daylight saving time argue that eliminating the biannual clock change would reduce disruptions to sleep schedules, lower rates of seasonal health problems linked to time shifts, and benefit sectors such as retail and outdoor recreation that profit from evening daylight. Economists have also pointed to potential productivity gains from a more stable annual schedule.

The proposal is distinct from making permanent standard time, which some sleep researchers and medical groups have advocated. The debate over which time to make permanent — daylight saving or standard — remains unresolved among experts, though the legislative push currently favors the daylight saving option backed by Trump.