Save a due date.
Overwrites an existing due date for a program.
Day must be between 1 and 28.
(Note: Due date is required for credit full-balance program types.)
This endpoint has three possible effects:
- If the specified due date already exists and is activated, the request does nothing.
- If the specified due date already exists and is deactivated, the request reactivates it.
- If the specified due date does not exist, the request creates it.