The practice of daylight saving time spans over a century of U.S. law. Here's who started it and why we observe the time ...

Arizona does not observe daylight saving time, remaining on Mountain Standard Time year-round and avoiding the annual shift ...

No, your power didn't go out — the time changed to daylight saving time! For some, daylight saving time is a sign that spring ...

Daylight saving time is forcing a lot of people to move their clocks forward by an hour. But people who live here won't have ...

Here's what to know about when DST started and ends in 2025, why it exists and if President Donald Trump is actually ending it.

Arizona maintains its refusal to observe Daylight Saving Time due to considerations of intense heat and lifestyle.

Daylight saving time begins on Sunday, March 9, meaning most Americans will lose an hour of sleep as we "spring forward." ...

You may have been groggy this morning thanks to our clocks “springing forward” an hour overnight. Unless, of course, you live in either of the two states that don’t observe daylight saving ...

A poster from 1918 encourages citizens to write a postcard and lobby Congress in support of daylight saving time. Credit: ...

Clocks had to "spring forward" one hour at 2 a.m. on Sunday, March 9, 2025, causing most people to lose an hour of sleep. We won't "fall back" to standard time again until Nov. 2, the first Sunday of ...

Daylight Saving Time ends on the first Sunday of November in the fall of each year. That's when states turn clocks back an hour. In the U.S., clocks will officially spring forward at 2 a.m. on Sunday, ...

According to the Department of Transportation, daylight saving time saves energy, prevents traffic injuries and reduces crime. Hawaii and parts of Arizona do not participate in daylight saving time.