Julian - Sunday-based year with week numbers
         January 1752         
   Sun Mon Tue Wed Thu Fri Sat
 1               1   2   3   4
 2   5   6   7   8   9  10  11
 3  12  13  14  15  16  17  18
 4  19  20  21  22  23  24  25
 5  26  27  28  29  30  31