Easy Projects allows you to manage vacations, both corporate and personal, with great ease. The minimum vacation you can add is half a day (4 hours). A wide range of vacation types are available (Leave of Absence, Trade Show, etc.). To add a custom vacation type, refer to Vacation types.
Please note that the vacations calendar only allows you to view public holidays, but not to manage them. i.e. add, edit or delete. Public holidays are managed in Administration settings > Company schedule.