Although we have tried to get all airports into our database, we are not perfect. You know... there quite a lot of airports out there... So what we recommend to do is:
Find the closest airport in the same timezone (Use this website: https://www.timeanddate.com/time/map/) and use the new airport instead of the missing one, or
Contact us via our chat and we will help you do the same :-)
Please make sure to inform us about missing airport, so we can add them to our list.
Thank you.
The Timeshifter Team