ich habe mal die FAQ bemüht...
Is it possible to change my travel date after registering and receiving my QR code?
Yes. However, flight changes are permitted within 72 hours from the original flight time registered in the Thailand Pass without the need to apply for a new Thailand Pass QR Code, provided that all other required documents remain valid or updated.
Thailand Pass FAQs. Whether or not you have a question or just a little bit of clarification in mind about Thailand Pass, this is the right place to find clarity or answers.
www.thaiembassy.com