The date and time on the review step use your local time, not a fixed store time zone hidden in the form.
Submit a few minutes before the moment you care about only if that moment is still in the future. The form rejects a time that is already too close or already past.
Pick a future time
- Pick the calendar date
- Pick the clock time
- Leave a few minutes of buffer
- The confirmation shows the scheduled time
If the task stays scheduled past that time, open History and check the status before you submit a duplicate.