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U.S. Clocks Fall Back Sunday as Push to End Time Changes Stalls in Senate

New health evidence favors permanent standard time for better alignment with circadian biology.

Overview

  • Daylight saving time ends on Sunday, Nov. 2, at 2 a.m. local time, when clocks shift back one hour to standard time, according to federal timekeeping rules.
  • A Senate bid to make daylight saving time permanent was halted this week after Sen. Tom Cotton opposed fast-tracking the measure, leaving nationwide change on hold.
  • An AP-NORC poll finds only 12% of U.S. adults support the twice-yearly clock changes, with a majority preferring a single year-round time and 56% favoring permanent daylight saving time.
  • A Stanford-led study in PNAS estimates permanent standard time could avert about 300,000 strokes annually and reduce obesity by 2.6 million cases, and major medical groups endorse standard time.
  • Nineteen states have passed laws to adopt year-round daylight saving time, but those statutes cannot take effect without Congressional authorization under the Uniform Time Act.