I try to keep my sleep schedule by adjusting to the amount of days my trip is. If I’m going to stay a short time I would try to get used to sleeping closer to the time I would sleep there before I leave on my trip. Or if I don’t have time to prepare beforehand I will just keep my regular sleep schedule as much as possible.
If I stay a long time I focus more on packing before hand and switch over to a healthy sleep transition once I’m there. I’ve heard it takes as many days as hours difference in time zones. So an example would be if I’m traveling from the West Coast (USA) to the East Coast I would need three days to adjust because it’s a three hour time difference