Jet Lag Adjustment Planner
Jet lag begins when the body clock still follows home time while meals, daylight, work, and sleep have moved to destination time. The more time zones crossed, the more adjustment may be needed. Eastward travel is often harder because the body has to move sleep earlier rather than later.
This planner gives you a place to coordinate sleep, light, meals, caffeine, and the flight itself. Exact light timing is not intuitive, so treat the worksheet as general preparation rather than a medical schedule.
Start with the trip
| Home location and time zone | □ |
|---|---|
| Destination and time zone | □ |
| Time zones crossed | □ |
| Direction | East □ West □ |
| Departure date and local time | □ |
| Arrival date and destination time | □ |
| Usual bedtime at home | □ |
| Usual wake time at home | □ |
| First fixed commitment after arrival | □ |
| Target bedtime at destination | □ |
| Target wake time at destination | □ |
Three days before travel
For eastward travel
- Move bedtime and wake time earlier by about one hour each day if your schedule allows it.
- Seek bright light early in the morning.
- Reduce bright light in the evening.
- Move meals toward the earlier destination schedule.
For westward travel
- Move bedtime and wake time later by about one hour each day if your schedule allows it.
- Use light later in the day to support the delay.
- Move meals toward the later destination schedule.
Even one or two hours of adjustment across two or three nights can reduce the size of the change on arrival. Trips across more time zones may need preparation over more days.
Departure day
- Start the day with the sleep and wake target from your preparation plan.
- Use the direction of travel to decide whether morning or later light supports the shift.
- Keep meals light and timed toward the destination where practical.
- Avoid beginning the trip already short of sleep.
- Set your watch or phone to destination time once the flight begins.
During the flight
- Follow destination time: try to sleep when it is night there and remain awake when it is day.
- Control light: use an eye mask and avoid bright cabin light when destination time says night.
- Use caffeine carefully: stop at least six hours before the sleep period you are trying to protect.
- Drink water: dry cabin air can contribute to dehydration and travel fatigue.
- Skip alcohol: it can disrupt sleep and add to dehydration.
- Move: on a long flight, get up and walk when it is safe.
Arrival day
- Change to local meal times even if hunger has not caught up.
- Use correctly timed local light as the main signal for the body clock.
- Avoid bright light during the period that would push the clock in the wrong direction.
- If exhaustion makes a nap necessary, keep it to twenty or thirty minutes and finish before the middle of the afternoon.
- Avoid a long nap or any nap within six hours of the target bedtime.
- Aim for the local target bedtime rather than following home time.
The first three destination days
| Plan | Day 1 | Day 2 | Day 3 |
|---|---|---|---|
| Target wake time | □ | □ | □ |
| Bright light window | □ | □ | □ |
| Light avoidance window | □ | □ | □ |
| Breakfast time | □ | □ | □ |
| Caffeine cutoff | □ | □ | □ |
| Latest possible nap | □ | □ | □ |
| Evening meal | □ | □ | □ |
| Target bedtime | □ | □ | □ |
| What actually happened | □ | □ | □ |
Keep wake time, local meals, and planned light exposure steady while the body catches up. Jet lag may take about one day for each time zone crossed, though direction, age, light exposure, stress, sleep flexibility, and the trip itself can change recovery time.
If the plan slips
- Return to the destination wake time rather than sleeping far into the day.
- Use local meal times as another timing cue.
- Choose a short early nap if safety or alertness requires it.
- Protect the next target bedtime from late caffeine and alcohol.
- Resume the planned light and darkness windows instead of trying to fix everything at once.
Light at the wrong time can shift the body clock in the wrong direction. Melatonin timing also matters, and sleeping pills do not reset the body clock. Speak with a doctor, travel nurse, or sleep specialist before using melatonin or sleep medicine, especially when other medication or a health condition is involved.
This planner provides general information. Get individual advice for persistent insomnia, frequent long distance travel, or a schedule where sleepiness could affect safety.