Need help on calendar view appointment booking for Ios swift 4

HI all, im totally new in swift 4 for ios apps creation. Found a few readily available calendar coding, however i am trying to restrict the calendar to 5 business days. Can anyone help on the coding


Please, could you explain more about it please? 

Beacause I made a caledar access, apoitments, load all my caledaler data. Maybe I can help you.