To reset your sleep after vacation, move your wake-up time earlier by 30 to 60 minutes a day, get bright light as soon as you wake, and let your bedtime follow. From a typical vacation schedule of 2 AM to 10 AM, that gets most people back to a 6:30 AM alarm in 4 to 7 days. Start before your first day back if you can.
This guide is for vacations where your schedule drifted late but you stayed in or near your home time zone. If you flew across several time zones, your body clock has a different problem. See jet lag east vs. west or use the jet lag calculator.
Free toolSleep CalculatorBest bedtime or wake-up time, based on 90-minute sleep cycles.Why a week of late nights is hard to undo
A week of late nights and long lie-ins does more than make you tired. It moves your body clock later. You miss morning light, you get plenty of evening light, and your brain starts sending its "time to sleep" signal later each night.
So on your first night home, going to bed at 10:45 PM often doesn't work. You're not sleepy yet, because your clock still thinks it's early evening. It's the same thing that happens after a big weekend lie-in, just stretched over a whole week. Here's how weekend lie-ins shift your clock.
How fast can your clock move?
Research on shifting sleep before eastward flights gives a useful guide. In one study, people moved their sleep schedule earlier by either 1 or 2 hours a day for three days, with bright light in the morning. Their body clocks moved by a similar amount either way, about 1.5 to 1.8 hours over the three days. But the 2-hours-a-day group was moving faster than their clocks could follow and had trouble falling asleep.
The takeaway: about an hour a day tends to be a realistic ceiling, even with good morning light. Without a light box or much time outdoors, 30 minutes a day is gentler and easier to stick to.
The day-by-day plan
Both plans below start from a vacation schedule of asleep at 2:15 AM and up at 10:00 AM, and end at a 10:45 PM bedtime with a 6:30 AM alarm. Every bedtime gives you 5 full sleep cycles (7.5 hours) plus 15 minutes to fall asleep.
Gentle plan: 30 minutes a day (7 nights)
| Night | Bedtime | Wake-up time |
|---|---|---|
| Vacation | 2:15 AM | 10:00 AM |
| 1 | 1:45 AM | 9:30 AM |
| 2 | 1:15 AM | 9:00 AM |
| 3 | 12:45 AM | 8:30 AM |
| 4 | 12:15 AM | 8:00 AM |
| 5 | 11:45 PM | 7:30 AM |
| 6 | 11:15 PM | 7:00 AM |
| 7 | 10:45 PM | 6:30 AM |
Faster plan: 1 hour a day (4 nights)
| Night | Bedtime | Wake-up time |
|---|---|---|
| Vacation | 2:15 AM | 10:00 AM |
| 1 | 1:15 AM | 9:00 AM |
| 2 | 12:15 AM | 8:00 AM |
| 3 | 11:15 PM | 7:00 AM |
| 4 | 10:45 PM | 6:30 AM |
The wake-up time is the part that matters most. If you can't fall asleep at the new bedtime, don't worry about it. Get up at the planned time anyway, and the extra sleep pressure will help the next night. Different target? The sleep calculator gives you the bedtime for any alarm.
What to do each day
Moving the alarm is only half of it. These habits are what actually pull your clock earlier:
- Get bright light within 30 minutes of waking. Go outside if you can. Outdoor light is far stronger than indoor lighting, even on a cloudy day.
- Dim the lights in the evening. Bright light and screens late at night push your clock back the other way.
- Move caffeine earlier. For a 10:45 PM bedtime, finish an 8 oz coffee by about 1:05 PM so it drops below 25 mg by bedtime. The caffeine calculator handles other drinks and bedtimes.
- Keep naps short and early. A 20-minute nap before about 3 PM is fine. A long late nap undoes a day of progress.
- Cut back on evening drinks. Vacation habits often include a few. Alcohol tends to break up the second half of the night, so check when to stop drinking alcohol before bed.
- Eat meals at your normal home times. Regular mealtimes give your day more structure.
Back at work tomorrow?
If you've run out of days, skip the gradual plan. Set your alarm for your normal time on the first morning and get outside right away. Stay up until you're genuinely sleepy that night, even if it's later than you'd like, and keep the same alarm the next day.
You'll probably have one or two short nights. That's uncomfortable but temporary, and the tiredness builds the sleep pressure that makes an earlier bedtime work. Just don't sleep in to compensate. If you're running on very little sleep, don't drive drowsy.
Plan it before you leave next time
The easiest reset is the one you start early. On the last two or three days of a trip, begin moving your wake-up time earlier and get morning light while you're still away. Coming home a day before you're due back at work also gives you a buffer.
Research on people camping with only natural light found their body clocks lined up with sunrise and sunset, and the people with the latest body clocks shifted the most. Plenty of early outdoor light can do a lot of the work for you. For a longer-term plan, see how to go to bed earlier.