Doesn't quite work as expected. From "python -m calendar 1752 9" I get:

     September 1752
  Mo Tu We Th Fr Sa Su
               1  2  3
   4  5  6  7  8  9 10
  11 12 13 14 15 16 17
  18 19 20 21 22 23 24
  25 26 27 28 29 30

"cal 9 1752" on the other hand gives:

      September 1752
   S  M Tu  W Th  F  S
         1  2 14 15 16
  17 18 19 20 21 22 23
  24 25 26 27 28 29 30

Maybe python doesn't auto recognize the timezone?

EDIT: Actually this is pretty bad because python gets all the days of the week before September 1752 in North America wrong.