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 ...

The rest of the country, including parts of the Navajo Nation within Arizona, observes daylight saving time. On Sunday at 2 a ...

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 ...

Daylight saving time stole an hour of sleep from most Americans over the weekend — with the exception of two states. The ...

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 ...

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

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

Hawaii and parts of Arizona do not participate in daylight saving time. The Navajo Nation ‒ which spans across Arizona, Utah and New Mexico ‒ does observe the time change, making it the lone ...

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, ...

The start of daylight saving time means dawn and sunset will be an hour later on Sunday, March 9 than they were on Saturday, March 8. For most Americans, except those in Arizona, Hawaii ...

The Navajo Nation in the northeast quarter of the state does observe daylight saving time. The Hopi Nation, fully surrounded ...

Because of its desert climate, Arizona doesn't follow daylight saving time (with the exception of the Navajo Nation, which is located in parts of Utah and New Mexico as well as Arizona).