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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
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