Gregorian - Sunday-based 3 months with weeks
  November 2147483646      December 2147483646       January 2147483647  
   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  48                    1   1        1  2  3  4  5
45  4  5  6  7  8  9 10  49  2  3  4  5  6  7  8   2  6  7  8  9 10 11 12
46 11 12 13 14 15 16 17  50  9 10 11 12 13 14 15   3 13 14 15 16 17 18 19
47 18 19 20 21 22 23 24  51 16 17 18 19 20 21 22   4 20 21 22 23 24 25 26
48 25 26 27 28 29 30     52 23 24 25 26 27 28 29   5 27 28 29 30 31      
                         53 30 31