You can schedule your departure or arrival according to meetings. your schedule or other interests.
The news are that you can now choose separate flexibility for your depart and return flights. This is an extra
commodity, giving you a chance to pick more convenient days or lower fares.
Even more, where you can aford to be flexible, you can clearly decide to set from the start the flexibility to 1 day, 2 days, or 3 days.
Don't forget, you can do this twice - separately for the depart and return flight.