Variable: todo-date-pattern
todo-date-pattern is a variable defined in todo-mode.el.gz.
Value
"\\(?4:\\(?5:\\(\\(?:Fri\\|Mon\\|S\\(?:atur\\|un\\)\\|\\(?:T\\(?:hur\\|ue\\)\\|Wedne\\)s\\)day\\)\\)\\|\\(?6:\\(?:\\*\\.?\\|A\\(?:pr\\(?:\\.\\|il\\)?\\|ug\\(?:\\.\\|ust\\)?\\)\\|Dec\\(?:\\.\\|ember\\)?\\|Feb\\(?:\\.\\|ruary\\)?\\|J\\(?:an\\(?:\\.\\|uary\\)?\\|u\\(?:l[.y]\\|n[.e]\\|[ln]\\)\\)\\|Ma\\(?:r\\(?:\\.\\|ch\\)\\|y\\.\\|[ry]\\)\\|Nov\\(?:\\.\\|ember\\)?\\|Oct\\(?:\\.\\|ober\\)?\\|Sep\\(?:\\.\\|tember\\)?\\)\\) \\(?8:[0-9]+\\|\\*\\), \\(?9:[0-9]+\\|\\*\\)\\)"
Documentation
Regular expression matching a todo item date header.
The value of calendar-date-display-form determines the form of
the date header.
Source Code
;; Defined in /usr/src/emacs/lisp/calendar/todo-mode.el.gz
(defconst todo-date-pattern
(let* ((dayname (diary-name-pattern calendar-day-name-array nil t))
(d (concat "\\(?" (alist-get 'day todo--date-pattern-groups)
":[0-9]+\\|\\*\\)"))
(mn (format (concat "\\(?" (alist-get 'monthname
todo--date-pattern-groups)
":%s\\)")
(diary-name-pattern todo-month-name-array
todo-month-abbrev-array)))
(m (concat "\\(?" (alist-get 'month todo--date-pattern-groups)
":[0-9]+\\|\\*\\)"))
(y (concat "\\(?" (alist-get 'year todo--date-pattern-groups)
":[0-9]+\\|\\*\\)"))
(dd "1111111")
(mm "2222222")
(yy "3333333")
(s (concat "\\(?4:\\(?5:" dayname "\\)\\|"
(calendar-dlet
((dayname)
(monthname mn)
(year yy)
(month mm)
(day dd))
(mapconcat #'eval calendar-date-display-form))
"\\)")))
;; The default value of calendar-iso-date-display-form calls
;; `string-to-number' on the values of `month' and `day', so we
;; gave them placeholder values above and now replace these with
;; the necessary regexps with appropriately numbered groups, because
;; `todo-edit-item--header' uses these groups.
(when (string-match dd s nil t)
(setq s (string-replace dd d s)))
(when (string-match mm s nil t)
(setq s (string-replace mm m s)))
(when (string-match yy s nil t)
(setq s (string-replace yy y s)))
s)
"Regular expression matching a todo item date header.
The value of `calendar-date-display-form' determines the form of
the date header.")