Start and End date for a given week

Hi,
I'm fairly new to Swift and I'm currently experimenting with an app based on EventKit data. In this app the user will select a week in the current year, like week 10. I need a way to find the start and end date for the selected week (Monday March 8 and Sunday March 14 for week 10 (at least in Sweden)) This will then be used as predicate when fetching events from the calendar. I'm also thinking that I would like the solution to take into account the users current calendar settings, like firstWeekday etc.

I really can't seem to find a solution for this, anyone that can point me in the right direction?

Thanks in advance!
Start and End date for a given week
 
 
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