Standard time returns: check the time zone as well as the clock

Most of the United States returned to standard time on Sunday, November 1, ending this year’s daylight saving period. The change occurred at 2 a.m. local time, when clocks moved back to 1 a.m. The National Institute of Standards and Technology lists that date for 2026, and the U.S. Naval Observatory independently lists the same transition. For households, the remaining task is to check that their clocks and plans agree.

The repeated hour is a change in the labels on the clock. It does not create additional sunlight. NIST explains that the autumn transition shifts an hour of daylight from the evening toward the morning in clock terms. That distinction matters when arranging the day: an unchanged appointment time can now fall at a different point relative to sunrise or sunset.

Not every U.S. location changes its clocks. The Transportation Department lists Hawaii, most of Arizona, American Samoa, Guam, the Northern Mariana Islands, Puerto Rico and the Virgin Islands among the places that do not observe daylight saving time. NIST notes the Navajo exception within Arizona. A national reminder therefore needs a location check, especially when coordinating with people whose clocks stay on standard time throughout the year.

Automatic updating also deserves a quick check. NIST explains that its computer time services distribute Coordinated Universal Time, while the operating system applies the local time-zone and daylight-saving rules. A device receiving an accurate time signal can still display the wrong local hour if its settings are wrong. The practical check is to confirm the selected time zone and current software before manually adding or subtracting another hour.

The same care helps with shared calendars. NIST’s local-time guidance distinguishes Eastern standard time from Eastern daylight time, while the broader designation Eastern time follows whichever is currently in effect. For a meeting spanning locations, specifying the date, local time and time zone is clearer than assuming a familiar difference between cities will always remain fixed.

International arrangements need their own verification. Countries decide their time rules separately, and NIST warns that transition dates can differ from U.S. dates. Sunday’s American change is consequently no reason to assume every overseas colleague moved a clock too. For travel or an appointment, check the provider’s current local-time instructions and confirm any ambiguous calendar entry with the organizer. That is a small administrative step with a direct purpose: everyone arriving at the same moment.

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Zina Walter

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Zina coordinates the five reporting desks and conducts the final publication review of factual attribution, defamation, privacy, copyright and image rights.

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