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