Variable: diary-nonmarking-symbol
diary-nonmarking-symbol is a customizable variable defined in
calendar.el.gz.
Value
"&"
Documentation
Symbol indicating that a diary entry is not to be marked in the calendar.
Source Code
;; Defined in /usr/src/emacs/lisp/calendar/calendar.el.gz
;; FIXME do these have to be single characters?
(defcustom diary-nonmarking-symbol "&"
"Symbol indicating that a diary entry is not to be marked in the calendar."
:type 'string
:group 'diary)