Gregorian - Monday-based week with week numbers
      August 2006             September 2006            October 2006     
   Mo Tu We Th Fr Sa Su     Mo Tu We Th Fr Sa Su     Mo Tu We Th Fr Sa Su
31     1  2  3  4  5  6  35              1  2  3  39                    1
32  7  8  9 10 11 12 13  36  4  5  6  7  8  9 10  40  2  3  4  5  6  7  8
33 14 15 16 17 18 19 20  37 11 12 13 14 15 16 17  41  9 10 11 12 13 14 15
34 21 22 23 24 25 26 27  38 18 19 20 21 22 23 24  42 16 17 18 19 20 21 22
35 28 29 30 31           39 25 26 27 28 29 30     43 23 24 25 26 27 28 29
                                                  44 30 31