Why are we still changing our clocks for daylight saving time?

Why America Still Changes Its Clocks for Daylight Saving Time

As the northern hemisphere moves into the darker months, Americans prepare once again to adjust their clocks for the end of daylight saving time.

The Annual Clock Change

Every state in the U.S., except Hawaii and Arizona, will set clocks back by one hour on Sunday in early November. This marks the moment when time officially rolls back to 1 a.m. Most people simply set their clocks back before going to bed on Saturday night.

Shortening Days and Earlier Sunsets

The amount of daylight has been decreasing gradually since the Summer Solstice. According to the National Oceanic and Atmospheric Administration (NOAA), by early November the sun will set in San Diego as early as 4:56 p.m. and rise at 6:07 a.m.

Seasonal Impacts

By Thanksgiving Day, November 27, the sun will set even earlier at 4:43 p.m. Combined with heavier meals and shorter daylight, many may feel more tired during the evening hours.

The Winter Solstice

The shortest day of the year arrives on December 21, the Winter Solstice, when the sun sets around 4:47 p.m. It marks the beginning of longer nights and is often seen as a symbolic turning point toward brighter days ahead.

The shortest day and the longest night of the year occur on December 21, according to NOAA.

Author’s Summary: America continues to observe biannual clock changes, despite shrinking daylight and growing debate over its usefulness.

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NBC 7 San Diego NBC 7 San Diego — 2025-11-01

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