In March, millions of Americans will turn their clocks forward, marking the start of daylight saving time in 2025. The controversial practice of "springing forward" and "falling back" has been observed in most states for decades.

In 2025, Americans will “spring ahead” on Sunday, March 9, marking the end of standard time and the beginning of daylight saving time. At that time, clocks will jump ahead one hour from 2 a.m. to 3 a.m.

Winter is winding down as the sun sets later each day, but nothing says spring like the day we spring the clocks forward. Under the current daylight saving period, most Americans will lose an hour on the second Sunday of March and gain an hour on the first Sunday of November.

While most states follow the biannual practice, Arizona — with the exception of the Navajo Nation — and Hawaii do not partake in daylight saving time. The U.S. territories of Puerto Rico, Guam, American Samoa, and the U.S. Virgin Islands also forgo the twice-yearly changing of the clocks.

Here's when daylight savings time starts and ends this year and what would happen around the country if it ends permanently in 2025.

Daylight saving time will start on Sunday, March 9. The “spring forward” changeover officially takes place at 2 a.m., when we move the clocks ahead by one hour, meaning sunrise and sunset will be about one hour later on March 9 than the day before and there will be more light in the evening and less in the morning.

Trump says it's "inconvenient" and "very costly." Most countries do not observe daylight saving time. Arizona and Hawaii don't change their clocks at all.

Arkansas lawmaker said ending daylight saving time would improve student performance and set an example for neighboring states.

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In March, millions of Americans will turn their clocks forward, marking the start of daylight saving time in 2025. The controversial practice of "springing forward" and "falling back" has been observed in most states for decades.

A Republican lawmaker who represents parts of six rural Nevada counties is sponsoring a bill to take the state off daylight saving time — one of the 200 bills written so far.