It's that time of year again: Many Americans will have to reset their clocks and circadian rhythms when daylight saving time ends on Sunday. That means, in most states, lighter mornings and darker ...

When does daylight savings end? We change clocks behind 1 hour or fall back at 2 am ET Sunday, Nov. 2, 2025. DST starts (spring forward) March 8, 2026.

That is not a misspelling in the title. It is saving, not savings, time. We all recently set our clocks back an hour. If you didn’t, that may be the reason you have been early to everything recently.

From 'hibernating behavior' to light boxes, here's what you need to know to help with this biannual clock change ritual.