@Emilia42
I get a lot of international guests so about half of the guests I've hosted got their check-in/out date wrong 🙂 including my current guest.
Nowadays I usually ask guests 'If possible, please send a screenshot of the flight itinerary - just to make sure we get accurate dates, times, and flight info. Due to the time difference, we've had a few mix-ups in the past 🙂 ' Most of my guests seemed to understand and were happy to oblige~
But when I think about it.......I've had plenty of friends call me (since they know I travel a lot for work) to ask which dates they need to put in for a hotel reservation per their flight plans if they were arriving at the airport at 4am or if they wanted to 'check-out' at midnight to catch a 2am flight.