[HackerRank-python] Day of the Programmer

def dayOfProgrammer(year):
    # Write your code here
    if year == 1918:
        return '26.09.1918'
    
    check = False
    # Julian
    if ((year <= 1917) and (year % 4 == 0)):
        check = True
    # Gregorian
    elif (year % 400 == 0) or ((year % 4 == 0) and (year % 100 != 0)):
        check = True
       
    tday = 244 if check else 243
    
    return '{:02d}.09.{:04d}'.format(256 - tday, year)