This article originally appeared in Well+Good.

We're just days away from one of the most bittersweet moments of the year. On Sunday, March 14, the clocks spring ahead, marking the start of daylight saving time. Instantly gaining an hour of daylight in the evening (yay!) means we'll also lose an hour of sleep. To get your body ready for the switch,  Lauren Hale, PhD, vice chair of the board for the National Sleep Foundation, says you should start training now.

"It's hard to abruptly change your sleep schedule by one hour a night," says Dr. Hale, who is also a professor in the program of public health at Stony Brook University. "The body functions optimally when it has a regular bedtime and wake time, across the entire week from Sunday to Sunday. It’s better to try to ease into it,” says Dr. Hale.

In the nights leading up to the switch, slowly begin to shift your bedtime.