Winter Darkness, Short Days, and Your Sleep
Why sleep and mood sag in northern winters, how daylight sets the body clock, what morning light and timing do about it, and when low mood needs a doctor.
Topic · 6 articles
Travel, shift work & seasons
Your body clock is set by light and expects a regular day. Travel, shift rosters, clock changes and the seasons all pull against it. These guides explain what is happening and give timing-based fixes that work with the clock rather than against it.
They pair with the regional guides, which show how much daylight your own city actually gets across the year.
Start with
Quick answers
What is the single most useful tool for body-clock problems?
Light, timed deliberately: morning light pulls the clock earlier, evening light pushes it later. Almost every fix in this section — for jet lag, shifts, clock changes and winter — is a way of using that.
Does melatonin fix body-clock problems?
It can help with timing problems such as jet lag and some shift-work patterns when taken at the right time, because it is a clock signal rather than a sedative. It has limited evidence for ordinary insomnia.
All articles in Travel, shift work & seasons
Jet Lag Explained: How to Recover Faster
Why crossing time zones scrambles your body clock, why flying east is harder, and a practical plan — light, timing, naps, melatonin — to recover in days.
Shift Work and Sleep: Coping With Night Shifts
Night and rotating shifts fight your body clock. A practical guide: anchor sleep, light, caffeine timing, naps, the drive home, and when to see a doctor.
Daylight Saving Time and Your Sleep
What the clock change does to your body clock, why spring forward is harder than fall back, what research shows about the days after, and a four-day plan.
How to Sleep in Hot Weather
Why your body has to cool down to fall asleep, what heat and humidity do to sleep, and evidence-based ways to sleep better in summer — bedroom, bedding, timing.
Melatonin for Sleep: What It Does and Doesn’t Do
Melatonin is a timing signal, not a sedative. Where the evidence supports it, where it is weak, how much to take, when, and who should ask a doctor first.