First day with week numbers January 1 Su Mo Tu We Th Fr Sa 52  1 1 2 3 4 5 6 7 8 2 9 10 11 12 13 14 15 3 16 17 18 19 20 21 22 4 23 24 25 26 27 28 29 5 30 31 Reformation corner cases 1 with week numbers September 1752 Su Mo Tu We Th Fr Sa 35 1  2 14 15 16 36 17 18 19 20 21 22 23 37 24 25 26 27 28 29 30 Reformation corner cases 2 with week numbers September 1752 Su Mo Tu We Th Fr Sa 35 1 2 14 15 16 36 17 18 19 20 21 22 23 37 24 25 26 27 28 29 30 Reformation corner cases 3 with week numbers September 1752 Su Mo Tu We Th Fr Sa 35 1 2 14 15 16 36 17 18 19 20 21 22 23 37 24 25 26 27 28 29 30 Reformation corner cases 4 with week numbers September 1752 Su Mo Tu We Th Fr Sa 35 1 2 14 15 16 36 17 18 19 20 21 22 23 37 24 25 26 27 28 29 30 Last day with week numbers November 9999 December 9999 January 10000 Su Mo Tu We Th Fr Sa Su Mo Tu We Th Fr Sa Su Mo Tu We Th Fr Sa 44 1 2 3 4 5 6 48 1 2 3 4 52 1 45 7 8 9 10 11 12 13 49 5 6 7 8 9 10 11 1 2 3 4 5 6 7 8 46 14 15 16 17 18 19 20 50 12 13 14 15 16 17 18 2 9 10 11 12 13 14 15 47 21 22 23 24 25 26 27 51 19 20 21 22 23 24 25 3 16 17 18 19 20 21 22 48 28 29 30 52 26 27 28 29 30 31 4 23 24 25 26 27 28 29 5 30 31