Millions of people across North America set their clocks forward early Sunday as Daylight Saving Time (DST) officially began for 2026, shifting time by one hour and marking the start of longer evenings but also reviving debate about the controversial practice of changing clocks twice each year.

At 2:00 a.m. local time on Sunday, clocks jumped ahead to 3:00 a.m., effectively causing people to lose one hour of sleep overnight. The seasonal adjustment will remain in place for most of the year, with standard time scheduled to return on November 1, 2026.






The Annual “Spring Forward” Shift

The time change affects most U.S. states and several neighboring countries that follow the same schedule. The adjustment shifts an hour of daylight from the morning to the evening, resulting in later sunsets and brighter evenings as spring approaches.

However, not every region observes the shift. Hawaii, most of Arizona, and several U.S. territories remain on standard time year-round and do not change their clocks.

The current framework for DST in the United States dates back to the Uniform Time Act of 1966, which standardized the system nationwide. The start date has been the second Sunday in March since 2007.

Health and Safety Concerns After the Time Change

While the shift is intended to maximize daylight in the evening hours, experts warn that the abrupt one-hour change can disrupt sleep patterns and circadian rhythms.

Research cited in recent reports suggests the transition may contribute to increases in medical emergencies, workplace injuries, and road accidents in the days following the clock change.

A study highlighted this week estimated that the health and productivity effects of the spring transition could cost the U.S. economy around $672 million annually, driven largely by higher rates of heart attacks, strokes, and fatigue-related incidents.

Authorities in several states urged drivers to remain alert during the morning commute in the coming days as people adjust to altered sleep schedules and darker mornings.

Renewed Debate Over Ending Clock Changes

The arrival of DST has also reignited political debate about whether the twice-yearly clock change should continue.

Some lawmakers and policy advocates support making daylight saving time permanent, arguing it would eliminate disruption to sleep schedules and simplify timekeeping. The Sunshine Protection Act, which proposes year-round DST in the United States, has gained bipartisan attention but has repeatedly stalled in Congress.

Meanwhile, several jurisdictions are exploring their own reforms. In parts of Canada, policymakers are considering ending the seasonal time change entirely, reflecting growing dissatisfaction with the current system.

A Tradition Rooted in War-Time Energy Savings

Daylight Saving Time was first widely adopted during World War I and World War II as a measure to conserve energy and fuel. The concept was based on the idea that shifting daylight into the evening would reduce the need for artificial lighting.

Today, however, critics argue that modern energy consumption patterns have reduced or eliminated those benefits, while the health and productivity disruptions remain significant.

What Happens Next

For the next eight months, most Americans and Canadians will live under daylight saving time, enjoying later sunsets and extended evening daylight as summer approaches.

Yet the long-running debate over whether the clock should continue to change twice a year is unlikely to fade. With economic, health, and political arguments intensifying, policymakers may face increasing pressure to decide whether the seasonal time shift should become a permanent feature — or a relic of the past.