If you pre-populated the boxes, the user would have the added advantage of knowing the format to modify (eg. simply adjust the day of month up from '10' to '11' if you're scheduled to arrive a day late.
If you pre-populated the boxes, the user would have the added advantage of knowing the format to modify (eg. simply adjust the day of month up from '10' to '11' if you're scheduled to arrive a day late.