内容摘要：On Wednesday, Trump said more scrutiny of Harvard’s students is necessary.

On Wednesday, Trump said more scrutiny of Harvard’s students is necessary.

and losing that hour of sleep can do more than leave you tired and cranky the next day. It also could harm your health.Darker mornings and more evening light together knock your body clock out of whack — which means daylight saving time can usher in sleep trouble for weeks or longer. Studies have even found an uptick in heart attacks and strokes right after the March time change.

There are ways to ease the adjustment, including getting more sunshine to help reset your circadian rhythm for healthful sleep.Daylight saving time begins Sunday at 2 a.m., an hour of sleep vanishing in most of the U.S. The ritual will reverse on Nov. 2 when clocks “fall back” as daylight saving time ends.Hawaii and most of Arizona don’t make the spring switch, sticking to standard time year-round along with Puerto Rico, American Samoa, Guam and the U.S. Virgin Islands. Worldwide, dozens of countries also observe daylight saving time, starting and ending at different dates.

Some people try to prepare for daylight saving time’s sleep jolt by going to bed a little earlier two or three nights ahead. With a third of American adults already not getting the recommended seven hours of nightly shuteye, catching up can be difficult.This article is part of AP’s Be Well coverage, focusing on wellness, fitness, diet and mental health.

The brain has a master clock that is set by exposure to sunlight and darkness. This circadian rhythm is a roughly 24-hour cycle that determines when we become sleepy and when we’re more alert. The patterns change with age, one reason that early-to-rise youngsters evolve into hard-to-wake teens.

Morning light resets the rhythm. By evening, levels of a hormone called melatonin begin to surge, triggering drowsiness. Too much light in the evening — that extra hour from daylight saving time — delays that surge and the cycle gets out of sync.“I don’t accept vaccines; it’s that easy. Because that’s where freedom of expression comes in,” said the man, Jacob Goertzen. “If we can’t make out own decisions, we don’t live in a democracy.”

Hernández, Cuauhtemoc’s health director, said outside influences affect community vaccine views.“The Mennonite population has a lot of access to social media and family members in the U.S. and Canada, where there are a lot of myths that have taken hold and many more ‘anti-vaccine’ groups than we have in Mexico,” he said.

A tractor works a field belonging to members of the Mennonite community in Cuauhtemoc, Mexico, Thursday, May 1, 2025. (AP Photo/Martin Silva Rey)A tractor works a field belonging to members of the Mennonite community in Cuauhtemoc, Mexico, Thursday, May 1, 2025. (AP Photo/Martin Silva Rey)