Jet Lag Calculator

Written byupdated

Result

  • Days to adjust5
  • Severitynoticeable jet lag
  • Directioneastward — the day shortens, which is the harder direction
  • Start preparing, days ahead3
  • How to shift your schedulego to bed an hour earlier each day before the flight
  • What to do about light

    Light after your body's own morning shifts the clock forward, and light shortly before it shifts it back. After a long eastward flight the local morning can fall in your body's night, so time bright light by your old sleep pattern and the number of zones crossed.

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