After the team selection the project timeline is decided as a pert chart or gantt chart. Since the timeline is based on the days needed to work on every single tasks of the whole project a gantt chart can useful. The days of vacation or holidays can be fixed in the timeline and there should be an early start to aim for early finish. Even if there are unlisted leave of the work day,There will be more chances to finish the project early or on time if the start is early in the decided timeline