"The date cannot be in the future."

Where: on a student's progression page, the date of a status (Learned or Validated), a note or a milestone.

Why: the chosen date is after today. Progression only records what has already happened. "Today" is worked out in the school's time zone. The owner and the instructor follow the same rule.

What to do: choose the real date, today or a past day. It is not possible to record progress in advance.