calendar-generate-month is a compiled Lisp function in `calendar.el'.

(calendar-generate-month MONTH YEAR INDENT)

Produce a calendar for MONTH, YEAR on the Gregorian calendar.
The calendar is inserted at the top of the buffer in which point is currently
located, but indented INDENT spaces. The indentation is done from the first
character on the line and does not disturb the first INDENT characters on the