Cannot select departure date in September

🚧 THIS IS A TICKET MIGRATED FROM UPVOTY. The original ticket and comments will be available for a limited time over at:
https://abrp.upvoty.com/b/report-a-bug/cannot-select-departure-date-in-september/
———————————————————————————
I'm planning a trip in September 2022. I cannot select departure dates in September for any of the legs. If I use the date picker to select a day in September, the result is the same day in October. August works, October works, but September is not working.