Frequency of Occurrence of DayOfMonth / DayOfWeek Combinations, largely calculated by MJD_DATE.EXE, freq-tbl.txt (c) J R Stockton, www.merlyn.demon.co.uk, >= 2000-07-21. Four Hundred Years - Full Gregorian Repeat Interval Tabulate Frequency of DayOfMonth / DayOfWeek Combinations First Y, M, D 2000 01 01 Final Y, M, D 2399 12 31 Inclusive Months 4800; Inclusive Daycount 146097 : 20871 weeks, 0 days. Day of Month Sun Mon Tue Wed Thu Fri Sat Average 1 688 684 687 685 685 687 684 685.714 2 684 688 684 687 685 685 687 " 3 687 684 688 684 687 685 685 " 4 685 687 684 688 684 687 685 " 5 685 685 687 684 688 684 687 " 6 687 685 685 687 684 688 684 " 7 684 687 685 685 687 684 688 " 8 688 684 687 685 685 687 684 " 9 684 688 684 687 685 685 687 " 10 687 684 688 684 687 685 685 " 11 685 687 684 688 684 687 685 " 12 685 685 687 684 688 684 687 " 13 687 685 685 687 684 688 684 " 14 684 687 685 685 687 684 688 " 15 688 684 687 685 685 687 684 " 16 684 688 684 687 685 685 687 " 17 687 684 688 684 687 685 685 " 18 685 687 684 688 684 687 685 " 19 685 685 687 684 688 684 687 " 20 687 685 685 687 684 688 684 " 21 684 687 685 685 687 684 688 " 22 688 684 687 685 685 687 684 " 23 684 688 684 687 685 685 687 " 24 687 684 688 684 687 685 685 " 25 685 687 684 688 684 687 685 " 26 685 685 687 684 688 684 687 " 27 687 685 685 687 684 688 684 " 28 684 687 685 685 687 684 688 " 29 644 641 644 642 642 643 641 642.429 30 627 631 626 631 627 629 629 628.571 31 400 399 401 398 402 399 401 400.000 Gregorian Note : distribution is uneven. The 13th is most often a Friday. Feb 29 : 13 15 13 15 13 14 14 ------ Twenty-Eight Years - Full Julian Repeat Interval Tabulate Frequency of DayOfMonth / DayOfWeek Combinations First Y, M, D 2000 01 01 Final Y, M, D 2027 12 31 Inclusive Months 336; Inclusive Daycount 10227 : 1461 weeks, 0 days. Day of Month Sun Mon Tue Wed Thu Fri Sat 1 48 48 48 48 48 48 48 2 48 48 48 48 48 48 48 3 48 48 48 48 48 48 48 4 48 48 48 48 48 48 48 5 48 48 48 48 48 48 48 6 48 48 48 48 48 48 48 7 48 48 48 48 48 48 48 8 48 48 48 48 48 48 48 9 48 48 48 48 48 48 48 10 48 48 48 48 48 48 48 11 48 48 48 48 48 48 48 12 48 48 48 48 48 48 48 13 48 48 48 48 48 48 48 14 48 48 48 48 48 48 48 15 48 48 48 48 48 48 48 16 48 48 48 48 48 48 48 17 48 48 48 48 48 48 48 18 48 48 48 48 48 48 48 19 48 48 48 48 48 48 48 20 48 48 48 48 48 48 48 21 48 48 48 48 48 48 48 22 48 48 48 48 48 48 48 23 48 48 48 48 48 48 48 24 48 48 48 48 48 48 48 25 48 48 48 48 48 48 48 26 48 48 48 48 48 48 48 27 48 48 48 48 48 48 48 28 48 48 48 48 48 48 48 29 45 45 45 45 45 45 45 30 44 44 44 44 44 44 44 31 28 28 28 28 28 28 28 Julian Note : each Day of Month is evenly distributed across the Week, as is February 29. ------