title: How to get n-th Sunday date of the month in objective c?
body: <p>How to get first sunday or nth sunday or monday (any day) date in Objective C coding.</p>
  
  <p>For example :- I just want to show date of friendship day in my app every year.</p>
  
  <p>But, friendship comes 1st Sunday of Aug. So, date will change every year. here I need to find what is the date of 1st Sunday in Aug every year.</p>
  
  <p>is there any logic to find the date of nth Sunday.</p>