Overview

• Spain shifts to winter time on Sunday, October 26, moving clocks from 3:00 to 2:00 and creating a 25‑hour day, per the BOE schedule.
• In the United States, Daylight Saving Time ends on Sunday, November 2, with clocks set back from 2:00 a.m. to 1:00 a.m. in most states.
• Hawaii, most of Arizona, Puerto Rico, Guam, the Northern Mariana Islands, American Samoa and the U.S. Virgin Islands do not observe DST.
• Argentina’s Chamber of Deputies approved a bill to set clocks back one hour during winter, and debate now centers on whether to adopt a seasonal shift or fix the country at UTC‑4.
• Chronobiologists endorse year‑round UTC‑4 to align with solar time, while economists caution that promised energy savings are uncertain and residential demand could rise; most consumer devices will update automatically when configured to do so.