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Post-holiday
blues: how to
bounce back

You're not lazy. It's jet lag.
For anyone back from a long break
No. 91Brain & BodyPart 11 of 15Fact-checked Oct 6, 2026
Video2:23 · English voice (AI) · English subtitles

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The full narration of the video.

The last night of a long holiday: the alarm is set, but sleep just won't come. The next day you're at your desk, and your head is still on vacation. This is what people call the post-holiday blues. First, relax: doctors say it isn't an illness. It's a common state of body and mind. And it's not just you. In a British survey of over a thousand people, more than half said that going back to work after a holiday left them low and unmotivated.

Why does this happen? The first reason hides in a little clock inside your body. This clock decides when you feel sleepy and when you feel awake. Over the holiday you went to bed late and slept in every day. So the clock got set later too. It's as if you quietly flew to another time zone. Then on the first day back, you flew home all at once. Scientists call this social jet lag.

Until the jet lag wears off, you feel drowsy, distracted, and a bit flat. The second reason: the good feeling you build up on holiday doesn't last long anyway. Studies found that about a week after returning to work, people's energy is back where it was before the break. So how do you bounce back? Trick one: pick a wake-up time and stick to it, every single day.

Once you're up, get some sunlight. Morning light tells the little clock: it's daytime, time to wind back. And by evening, you'll feel sleepy earlier. If you want to sleep earlier, move bedtime up a little each day, not by several hours in one night. Trick two: go easy on yourself for the first few days. Pick two or three small things that matter and finish them. Leave the tough jobs for a little later.

Trick three: give yourself something to look forward to. Research found that while people are waiting for a trip, they're already happier. A dinner plan for the weekend counts too. One more thing: if two weeks later you still feel low and sleep badly almost every day, don't tough it out. Go talk to a doctor. So feeling sluggish after a holiday doesn't mean you're lazy. Your little clock is still back on vacation. Give it a few days, and bring it home.

What's the hardest moment for you after a holiday? Tell me in the comments.

1

In one sentence

Feeling flat after a holiday usually means your body's little clock is still on holiday time. Give it a few days to wind back.

2

It's not what
you think

YOU THINK
I'm lazy, I have no willpower
Scolding yourself only makes you more tired.
ACTUALLY
Your body is jet-lagged
Staying up late and sleeping in every day is like quietly flying to another time zone. On the first day back, you fly home all at once.

Put simply: you never boarded a plane, but your body still has jet lag. Scientists call it "social jet lag."

3

Where it
comes from

① The clock slips laterA little clock inside you decides when you feel sleepy and awake. Late nights and lie-ins push it later.
② You fly back at onceOn the first workday the alarm drags you back to your old hours. The clock hasn't caught up.
③ Drowsy, distractedUntil the jet lag wears off, you feel drowsy, unfocused and flat — and can't fall asleep at night.
④ The glow fadesStudies found the good feeling from a holiday is back to pre-holiday levels about a week after returning to work.
4

How to
bounce back

Fix wake-up timeSame time every day, weekends too.
Morning sunMorning light tells the clock: it's day, wind back.
Bed a bit earlierA little each day, not hours in one night.
Small things firstFinish two or three that matter; go easy for the first days and save tough jobs for later.
Something aheadPeople are happier just while waiting for a trip.
Weekend dinnerSmall plans count; no big trip needed.
5

When not to
tough it out

14 Two weeks on,
still low and sleeping badly
Post-holiday blues aren't an illness — just a common state of body and mind. But if two weeks later you still feel down nearly every day, it's not jet lag anymore. Talk to a doctor.
Sluggish after a holiday?
You're not lazy
Your little clock is still on holiday. Get some morning sun, plan a weekend dinner — give it a few days and bring it home.
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