Daylight Saving Time in the United States: Will it end permanently?

Two ways DST could end permanently

When people speak of “ending DST permanently,” they can mean one of two opposite outcomes. The first is permanent daylight saving time: clocks would stay one hour ahead of standard time year‑round, so there would be no fall back or spring forward. The second is permanent standard time: clocks would stay on standard time year‑round, meaning mornings would be lighter earlier in winter but evenings would be darker longer into the year. The Sunshine Protection Act is designed to enact permanent daylight saving time, but it does not mandate that states that currently observe permanent standard time switch to daylight saving time. Crucially, current federal law allows states to opt out of DST by staying on standard time, but it does not permit states to adopt permanent DST on their own. This distinction matters because discussions about “ending DST” can imply very different outcomes for mornings, evenings, and public health.

In practical terms, if permanent DST takes effect, most of the United States would stay on a one-hour‑ahead schedule year-round, which would shift winter sunrises and sunsets later. If permanent standard time takes effect, the country would stay on the earlier‑day pattern that many health groups and researchers argue better aligns with human circadian biology and safety in the morning. These two paths have very different implications for daily life, traffic, school start times, and energy use.

Where the Sunshine Protection Act stands

Legislative action on permanent daylight saving time has moved in fits and starts. Media reporting indicates that the House passed the Sunshine Protection Act in July 2026 by a vote of 308–117, and the bill moved to the Senate for consideration. The Senate has not yet approved the measure, meaning the bill remains pending there. The legislation carries a timing wrinkle: the current session’s bills are set to expire in early January when the new Congress is seated, and if the bill dies, the effort to change daylight saving time would restart in the new session. Some reports also note that President Trump has expressed support for the measure, and there has been public discussion about holds or opposition in the Senate. Because legislative status can change, readers should verify the latest status on Congress.gov before acting on timelines or deadlines.

A brief look back: the 1974 year‑round DST experiment

The idea of year‑round daylight saving time is not new. In the 1970s, the United States experimented with year‑round DST during the energy crisis, beginning in January 1974 and continuing into early 1975. Congress ended that experiment in October 1974 after public opposition, with concerns voiced about children walking to school in dark winter mornings. This historical episode is often cited by opponents of permanent DST as an example of the practical trade‑offs involved in keeping later sunrises while darker mornings persist in winter. The episode also informs current debates about health, safety, and public acceptance when the clock is kept on a single time year‑round.

Calendar implications: current law vs. permanent DST

Under current law, daylight saving time begins in March and ends in November. For 2027, the typical pattern would be to start DST on March 14, 2027, at 2:00 a.m., and to end on November 7, 2027. If permanent daylight saving time takes effect, there would be no spring forward or fall back; clocks would remain on daylight saving time year‑round, and the annual March start and November end would be eliminated. The exact effective date of any permanent-DST transition would be defined by the law if the Sunshine Protection Act is enacted.

Note: If permanent DST becomes law, the reference to a one‑time transition or “reference date” would depend on the bill’s provisions and any federal implementation timeline. Always check the enacted text for precise dates and rules.

Why past experiments matter: the 1974–1975 episode in context

The 1974 experiment offers a direct historical precedent: a society‑wide move to year‑round daylight saving time led to public concern about darker winter mornings, especially for schoolchildren. Congress ended the experiment in 1974, citing opposition to darker commutes. That episode is frequently cited by opponents of permanent daylight saving time as evidence that more daylight in the evening does not automatically translate into broad public acceptance or safety benefits, particularly for morning routines and school transportation.

Can my state make DST permanent?

Under current federal law, states cannot adopt permanent daylight saving time on their own. They can opt to remain on permanent standard time, but adopting permanent daylight saving time requires federal action. As of the latest discussions, about 19 states have passed laws or resolutions supporting permanent daylight saving time, but those measures are contingent on Congress changing federal law. Texas, for example, was noted in reporting as having moved to that position in 2025. If the Sunshine Protection Act (or another federal change) does not pass, these state measures cannot take effect.

Which states and territories do not observe DST?

Hawaii and most of Arizona observe standard time year‑round. The Navajo Nation, which sits in part of Arizona, observes daylight saving time to align with neighboring states. The U.S. territories—American Samoa, Guam, the Northern Mariana Islands, Puerto Rico, and the U.S. Virgin Islands—also do not observe daylight saving time.

Health and energy considerations: what the evidence says

Public health and safety concerns drive much of the debate about permanent time policies. A 2025 Stanford modeling effort examined the health impacts of different time arrangements and concluded that moving to permanent standard time could reduce obesity cases by about 2.6 million and strokes by about 300,000 in the continental United States, with permanent daylight saving time also reducing these outcomes but to a lesser extent. The authors caution that these results are circadian‑health models and that other factors—economic activity, driver safety, and social patterns—also matter in a policy decision. In parallel, sleep and health organizations have expressed concerns about permanent daylight saving time, arguing that permanent standard time aligns better with human biology and daily routines for many people.

Public opinion and practical realities

Polls show broad interest in stopping clock changes, though preferences about which permanent time to adopt differ. A YouGov survey reported that 62% of Americans would prefer to stop switching clocks, with about half of those favoring permanent daylight saving time and 31% preferring permanent standard time. Historical polls also indicate that as many as 75% of Americans have favored no longer changing clocks, underscoring why the issue keeps resurfacing in policy debates.

Clocks, devices, and how to prepare

For most people, devices set to update automatically will shift correctly when DST begins or ends. On smartphones and other connected devices, ensure the time zone and automatic time settings are enabled, then verify the displayed time after the change. Large‑brand guidance exists from Apple, Google, and Samsung, along with carrier pages offering checks for specific devices. The practical takeaway is to confirm that automatic time updates are active and to verify the clock after the change to avoid confusion with wake times, alarms, and reminders.

For authoritative guidance on time zones and clock changes, the Department of Transportation remains the main U.S. authority, and its guidance should be consulted for any locale‑specific questions.

DOT Time Guidance

2027 calendar snapshot

Under current law, DST dates are typically March 14, 2027 (start) and November 7, 2027 (end). If permanent DST takes effect, the twice‑yearly clock changes would be eliminated, and the calendar would shift to a year‑round DST pattern, with no spring start or autumn end. The exact implementation would depend on the law’s text and any federal implementation timeline.

What this means for readers

Readers looking for a simple take‑away should note that the term “DST ending permanently” can mean two different futures: (1) year‑round daylight saving time, or (2) year‑round standard time. The Sunshine Protection Act aims to adopt the first path, but current federal law still imposes limits on what states can do independently. The timing of potential changes depends on Congress—the House has acted, the Senate has not, and the January expiration of the current session could force a restart if the bill dies.

Notes on sources and ongoing updates

As legislative status and exact dates can change, consult Congress.gov or other official congressional resources for the most up‑to‑date information. This article reflects the best available public reporting and historical context as of publication, including the 2026 end date (November 1, 2026, 2:00 a.m. local time) and the 2027 start (March 14, 2027) and end (November 7, 2027) under current law, the distinctions between permanent DST and permanent standard time, and the practical effects on clocks and devices. For health, safety, and energy considerations, referenced modeling and position statements illustrate the trade‑offs but should be understood as part of a broader policy conversation.