The docs say date validation should work with or without time but it only works with time.
This is a big problem for my application since the Date/Time picker doesn’t seem to pick time for me on datetime fields on the Calendar page. It only fills the date.
The picker does select time on timestamp fields like the lastedited field from the Inventory table.
Make sure you have set the correct Date/Time format or Format pattern for the field. DateTime picker or Timepicker uses that format to create the pickers. It the selected format does not contain the time part, date/time picker won’t fill time. Validation also uses the selected format to validate.
The issue was with my format in the DateTime Picker extension options. Solved.