As daylight saving time comes to an end, millions of Americans will gain an extra hour of sleep. On Sunday, November 2, clocks will be set back one hour at 2 a.m. Most states in the U.S. observe this biannual clock change, but Arizona and Hawaii do not participate in daylight saving time. These two states have opted out, taking advantage of a provision in the federal law that governs time changes.

The Uniform Time Act of 1966 mandates daylight saving time across the country but allows states to choose not to observe it. However, it does not permit states to adopt permanent daylight saving time, which would keep them an hour ahead from November to March while others revert to standard time. Over the past seven years, 18 states have passed legislation supporting year-round daylight saving time, often referred to as "lock the clock." In 2025, at least 31 states are considering similar legislation.

Some states are even exploring the possibility of changing their time zone entirely. However, any state-level changes to daylight saving time cannot take effect without a federal repeal of the Uniform Time Act. Congress would need to amend the law for states to implement permanent daylight saving time.

Efforts have been made at the congressional level to change the law. Former Senator Marco Rubio introduced the "Sunshine Protection Act," which aimed to establish permanent daylight saving time nationwide. Although the Senate passed a version of the bill in 2022, it did not advance in the House of Representatives. In January, Florida Senator Rick Scott reintroduced the measure, but it remains pending in committee.

States have taken various actions regarding daylight saving time. Alabama passed a law in May 2021 to observe daylight saving time permanently, but it awaits federal approval. Alaska has introduced bills to recognize year-round daylight saving time, but these have not progressed. In 2025, a bill was introduced in Alaska to exempt the state from daylight saving time until Congress allows it to be observed year-round.

Arizona, known for not observing daylight saving time, remains on Mountain Standard Time throughout the year. However, the Navajo Nation, which extends into Arizona, does observe daylight saving time, creating a one-hour difference from the rest of the state during the spring and summer months.

In Arkansas, a bill was introduced in December 2022 to adopt year-round daylight saving time, but it was withdrawn for further study. California voters approved a proposition in 2018 to allow the state legislature to pass legislation for permanent daylight saving time, but attempts to enact this have repeatedly failed.

Colorado passed a bipartisan bill in 2022 to make daylight saving time permanent, contingent on federal action. Connecticut has seen attempts to adopt Atlantic Standard Time, but these efforts have not advanced. Delaware's 2019 law to remain on daylight saving time permanently is also dependent on neighboring states making similar changes.

Florida was the first state to pass a resolution for year-round daylight saving time in 2018, pending congressional repeal of the Uniform Time Act. Georgia's legislature passed a similar law in 2021, but it too requires federal approval.

Hawaii does not observe daylight saving time and has not passed any legislation to change this. Idaho's situation is complex due to its division between two time zones, with a 2020 measure proposing permanent daylight saving time for the northern half of the state, contingent on Washington state making a similar change.

In Illinois, several bills have been introduced to make daylight saving time permanent, but they are currently awaiting committee action. Indiana has also seen multiple attempts to exempt the state from daylight saving time, but these efforts have not progressed. Iowa introduced two bills in 2025 to make daylight saving time permanent, but they died in committee.

Kansas state Senator Kenny Titus has introduced a bill regarding daylight saving time, but details on its progress are still pending. As the debate continues, the future of daylight saving time remains uncertain, hinging on both state and federal actions.