Something happened in the wee hours this Sunday morning that will send many of us into a groggy, moody mess come Monday.
Daylight Saving Time begins.
When we lose that precious hour overnight, we get less sleep.
"One hour can disrupt you enough that for a day or two at least, there's an increase in auto accidents, and an increase in heart attacks," notes the Cleveland Clinic's Dr. Michael McKee.
Even though you might wake up before the sun rises, there is a bright side to daylight saving time.
It signals the beginning of longer days and exposes us to more mood-boosting sunlight.
"Seasonal Affective Disorder, the depression that comes to many people in winter, starts to fade this time of year as sunlight comes out," Dr. McKee says.
Experts say you should take advantage of the longer days.
Go for a long walk, dig up your spring garden or shoot some hoops with your kids.
The time to fall back on your old ways will come soon enough.