19 states are ready to ban the time change. Here's what would need to happen first.

Clocks are set to “fall back” this weekend across the United States as daylight saving time is coming to an end.

Daylight saving time always begins on the second Sunday of March and ends on the first Sunday of November. In 2025, that means it started on March 9 and ends this Sunday, Nov. 2 at 2 a.m. local time.

Despite calls to make daylight saving time a permanent fixture throughout the year, the time change will happen in 2025. But some states and U.S. territories don’t observe DST, while others have passed legislation to end the semiannual clock change as soon as federal law allows it.

Here is what you need to know.

What is daylight saving time?

Daylight saving time is the period between March and November when most Americans set their clocks forward by 1 hour. In March, we set the clock forward to gain more daylight in the summer evenings. But, when we “fall back” in November, it’s to add more daylight in the mornings.

Where is daylight saving time not observed?

According to the National Conference of State Legislatures (NCSL), the following states and territories do not observe daylight saving time, meaning they observe standard time all year round:

• Hawaii
• Arizona (with the exception of the Navajo Nation)
• American Samoa
• Guam
• Northern Mariana Islands
• Puerto Rico
• U.S. Virgin Islands

Some states have legislation ready if Congress ditches time change

Another 19 states have passed laws to do away with the time change and shift to year-round daylight saving time, according to the NCSL. But those changes would only be implemented if the U.S. Congress were to pass federal legislation to allow for such a move.

And that Congressional change might be far away.

On Tuesday, Oct. 28, a bill to make daylight saving time permanent stalled in the Senate after Arkansas Republican Sen. Tom Cotton said he would oppose any effort to fast-track the bill, according to Reuters.

Per the NCSL, the 19 states set to make daylight saving time permanent − pending action from Congress − include the following:

• Texas
• Oklahoma
• Colorado
• Alabama
• Georgia
• Minnesota
• Mississippi
• Montana
• Idaho (Pacific time zone only)
• Louisiana
• South Carolina
• Utah
• Wyoming
• Delaware
• Maine
• Oregon (Pacific time zone only)
• Tennessee
• Washington
• Florida