When traveling east-to-west it will take the same amount of days as time-zones you traveled to completely get onto your new time-zone rhythm.
So if you fly from NY to LA, you are moving three times zones so it will take your body three days to adjust.
Now each day gets slightly easier but you aren't fully on schedule till day 4.
When flying west-to-east it takes the same amount of days as time zones PLUS 1 for your body adjusted.
What this means is that when you fly from NY to London you are changing five time zones, so it will take six days to recover and get into your new England time zone.
Now the inevitable question is
If I fly from Boston to London and then back to Boston three days later what happens.
In this case you can actually take the amount of days you were there (3) subtracted from the time-zones (5) and then subtract that number and subtract it back from your time-zones back (5) you can get back to your normal rhythm in 3 days. (The extra day gets cancelled out)
5-3= 2
5-2=3
So remember this next time you fly.
East to West. (Total Time Zones)
West to East. (Total Time Zones plus 1)
BUT when you are flying back to YOUR original time zone you can always divide by 2 since sleeping in your own bed can in itself help your recovery.
So if you leave home, fly from NY to Amsterdam and then back 4 days later it will take you
6 (time zones)-4(days in Amsterdam) =2
6 (time zones) -2 (recovery #)=4
4 (recovery #) divided by 2=2 days and you are gold!!!
Sent from my Verizon Wireless BlackBerry
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