Gregorian - Monday-based, week 40, 3 month
     September 2013            October 2013            November 2013     
   Mo Tu We Th Fr Sa Su     Mo Tu We Th Fr Sa Su     Mo Tu We Th Fr Sa Su
35                    1  40     1  2  3  4  5  6  44              1  2  3
36  2  3  4  5  6  7  8  41  7  8  9 10 11 12 13  45  4  5  6  7  8  9 10
37  9 10 11 12 13 14 15  42 14 15 16 17 18 19 20  46 11 12 13 14 15 16 17
38 16 17 18 19 20 21 22  43 21 22 23 24 25 26 27  47 18 19 20 21 22 23 24
39 23 24 25 26 27 28 29  44 28 29 30 31           48 25 26 27 28 29 30   
40 30