When is Daylight Saving Time 2025? Here’s what it is, reason, US States and Territories that do not follow it and how to prepare

When is daylight saving time? Daylight saving time affects millions of people in the United States each year. It adjusts the clocks twice—once in spring and again in fall—to maximize natural daylight. As 2025 progresses, people are preparing for the next clock change.

What is Daylight Saving Time?

Daylight saving time is a seasonal clock change observed in many parts of the US. It begins in spring and ends in fall. The main purpose is to make better use of daylight. In March, clocks are set forward by one hour, which allows for more daylight in the evening. In November, clocks are set back by one hour, giving people more daylight during the morning.

Date for End of Daylight Saving in 2025

Daylight saving time for 2025 will end at 2 a.m. local time on Sunday, November 2. At this time, clocks should be set back one hour. This change will result in an earlier sunset and more daylight in the morning. It also means one extra hour of sleep for most people. In 2026, daylight saving time will begin again on Sunday, March 8.


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US States and Territories That Do Not Follow Daylight Saving Time

While most of the United States observes daylight saving time, there are exceptions. Hawaii and most of Arizona do not adjust their clocks.

Arizona: The state does not follow daylight saving due to its desert climate. Extending daylight into the evening is not seen as useful in the hot months. However, the Navajo Nation, which spans parts of Arizona, Utah, and New Mexico, does observe daylight saving.

Hawaii: Located close to the equator, Hawaii experiences little change in daylight hours year-round. Therefore, it does not follow the practice.

US Territories: Five territories also do not observe daylight saving time. These are:

• American Samoa
• Guam
• Northern Mariana Islands
• Puerto Rico
• U.S. Virgin Islands

Reason Behind Daylight Saving Time

The idea behind daylight saving time is to reduce energy use by taking advantage of longer daylight hours. In spring, the extra hour of daylight in the evening can decrease electricity use. In fall, gaining morning light helps with visibility and reduces the need for lighting.

However, debates continue on whether the practice is still useful. Some people support a permanent time system to eliminate the need for clock changes.

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How to Prepare for Time Change?

Most digital clocks and devices adjust automatically, but some manual clocks will need to be set back by one hour before going to bed on Saturday night, November 1.

It is also a good time to check smoke alarms, emergency kits, and batteries, as many people use the clock change as a reminder for household safety checks.

FAQs

When does daylight saving time end in 2025?
Daylight saving time ends on Sunday, November 2, 2025, at 2 a.m. local time across most of the United States.

Which US states and territories do not observe daylight saving time?
Hawaii, most of Arizona, and five territories (American Samoa, Guam, Northern Mariana Islands, Puerto Rico, U.S. Virgin Islands) do not follow daylight saving time.