is a variable defined in `
Its value is
(format "%s %d"
- This variable may be risky if used as a file-local variable.
Default format for calendar month headings with the American date style.
Normally you should not customize this, but `calender-month-header'.
You can customize this variable.
This variable was introduced, or its default value was changed, in
version 24.4 of Emacs.