//Paste your solution here if you want to share it publicly with open("example.txt", "w") as f: daysInMonth = [31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31] day = 0# loops from 0 - 6 for year in range(9999): for month in range(12): numDays = daysInMonth[month] if month == 1: if (year + 1) % 4 == 0: if (year + 1) % 100 == 0: if (year + 1) % 400 == 0: numDays = 29 else: numDays = 29 for date in range(numDays): if day == 4 and date == 12: yStr = str(year + 1) mStr = str(month + 1) dStr = str(date + 1) yStr = (4 - len(yStr)) * "0" + yStr mStr = (2 - len(mStr)) * "0" + mStr dStr = (2 - len(dStr)) * "0" + dStr f.write(yStr + "-" + mStr + "-" + dStr + "\n") day = (day + 1) % 7