There appears to be a UI bug related to Date/Time metafield definitions and the “Minimum date and time” setting.
Reproduction steps:
- My store is in Australia/Sydney timezone (GMT+10).
- Go to the metafields admin and create a new date/time metafield definition.
- Set the min date to January 1, 2022 at 12:00AM (this date is in GMT+11).
- Save the definition.
- Now go to edit the definition.
- The “min” date and time are now 12/31/2021 at 12:00AM.
Setting the initial minimum date time.
When you go to edit the definition the minimum date and time has changed.

