import datetime
FRIDAY = 4
MONTHS_TO_CHECK = (1, 3, 5, 7, 8, 10, 12)
def check_1st_friday(day):
if day.weekday() == FRIDAY:
return True
return False
if __name__ == "__main__":
year_from = 2000
year_to = 2020
for year in range(year_from, year_to + 1):
for month in MONTHS_TO_CHECK:
day = datetime.date(year, month, 1)
if check_1st_friday(day):
print day