# Write a Python program to select all the Sundays of a specified year.  
 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)
   