Description
mixed 
jddayofweek ( int julianday [, int mode] )
     Returns the day of the week.  Can return a string or an integer
     depending on the mode.
     
表格 1. Calendar week modes
| Mode | Meaning | 
|---|
| 0 (Default) | 
          Returns the day number as an int (0=Sunday, 1=Monday, etc)
          | 
| 1 | 
          Returns string containing the day of week
          (English-Gregorian)
          | 
| 2 | 
          Returns a string containing the abbreviated day of week
          (English-Gregorian)
          |