Find out when to spring forward for daylight saving time and lose an hour of sleep, and which states don't observe it.

Daylight saving time in the U.S. starts on the second Sunday in March, and ends on the first Sunday in November. See 2026 dates.

Evidence suggests that Daylight Savings Time is linked to negative consequences, such as an increase in heart attacks and car crashes. "Springing forward" can also affect our relationships—when we are ...