Daylight saving time, commonly referred to as daylight savings, is approaching its annual observance for 2026, with most Americans preparing to adjust their clocks forward by one hour this Sunday. This time change, which occurs on the second Sunday of March, has been a routine part of life for nearly two decades.
So, what exactly is daylight saving time? By moving the clocks ahead an hour, it effectively reallocates an hour of daylight from the morning to the evening. For instance, in Boston, before the time change, the sun will rise at 6:09 a.m. and set at 5:41 p.m. On the day the clocks spring forward, sunrise will shift to 7:08 a.m. and sunset will be at 6:42 p.m.
As per tradition, daylight saving time will commence at 2 a.m. local time on Sunday, March 8. This schedule, established in 2007, is a shift from previous years when the time change occurred on the first Sunday of April. Prior to 1987, the start date was the last Sunday of April. Notably, during the energy crisis in the 1970s, a year-long experiment with permanent daylight saving time was briefly implemented but ultimately reverted back to standard time.
In March, most Americans will lose an hour of sleep as the clocks move from 2 a.m. to 3 a.m. This seasonal shift precedes the official commencement of spring, which will occur on March 20. As the year progresses, daylight saving time will conclude for most people on the first Sunday of November, allowing them to revert back to standard time.
Daylight saving time was initially introduced in the U.S. in 1918 as a measure to conserve fuel during World War I. It was temporarily reinstated during World War II for similar reasons related to national security. Although the time change has persisted since the 1960s, research indicates its effectiveness in conserving energy has been minimal; a 1974 study by the Transportation Department found negligible benefits regarding energy savings and public safety.
Interestingly, only two states—Hawaii and Arizona—choosing not to observe daylight saving time, with the exception of the Navajo Nation in Arizona. Additionally, territories like American Samoa, Guam, Puerto Rico, and the U.S. Virgin Islands also refrain from altering their clocks.
Modern technology has simplified the adjustment process; most smartphones are programmed to update automatically for daylight saving time. Major companies like Apple, Google, and Samsung offer guidance for users who may need assistance with the change, ensuring a seamless transition as millions prepare for the new season.
Despite the potential negative health impacts associated with the time change, including disrupted sleep patterns, there remains a sense of anticipation for the longer evenings ahead. As people adapt to the seasonal shift, it marks an opportunity for extended outdoor activities and a rejuvenation of the spirit as we welcome the brighter days of spring.