I heard this trick many years ago & have used it when ever I travel to another time zone.
Make sure you find time to watch the sunrise & sunset on your first couple of days. It somehow helps reset your internal clock.
The last time I flew to Spain, I made sure I was awake & watching the sunrise as we flew over the Atlantic Ocean.
Try it.....can't hurt. And you get the benefit of some quiet time as you watch the day changing.



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I'll discuss it with my cat and get back to you