from datetime import date, timedelta  
  
def all_sundays(year):  
# January 1st of the given year  
       dt = date(year, 1, 1)  
# First Sunday of the given year         
       dt += timedelta(days = 6 - dt.weekday())    
       while dt.year == year:  
          yield dt  
          dt += timedelta(days = 7)  
            
for s in all_sundays(2020):  
   print(s)  