We arrived at Tokyo’s Haneda airport at 6.25 pm Saturday night local time (well past midnight, Friday night Seattle time).
There are two methods to calculate the arrival time in Tokyo:
Method A
Depart Seattle Friday 15.40 pm
Fly 9 hrs 45 mins
Arrive Seattle Saturday 1.25 am
Arrive Tokyo Saturday 6.25 pm (Tokyo time = Seattle time +17 hrs)
Method B
Depart Seattle Friday 15.40 pm
Arrive Tokyo 6.25 pm
Is it Friday or Saturday in Tokyo?
It’s Saturday (+1 day) because the IDL was crossed flying west to east
