How to make a Calendar with notification system by using Swift? : <p>My project is about a calendar system. When the manager writes his worker's off days. The app will show all workers's off days on the Calendar and  has to remind the manager 2 weeks before off day. And all infos will be on database. I am pretty new to swift and ios. SQLite, NSCalendar..? Dont sure how to start. Some help would be great. </p>
