Neil H Watson, Linux consultant

(custom-set-variables
  ;; custom-set-variables was added by Custom.
  ;; If you edit it by hand, you could mess it up, so be careful.
  ;; Your init file should contain only one such instance.
  ;; If there is more than one, they won't work right.
  '(org-agenda-start-on-weekday nil)
)
(custom-set-faces
  ;; custom-set-faces was added by Custom.
  ;; If you edit it by hand, you could mess it up, so be careful.
  ;; Your init file should contain only one such instance.
  ;; If there is more than one, they won't work right.
 )
(require 'vimpulse)
(setq org-agenda-files (list "~/nhw.org"))
(require 'org-install)
(add-to-list 'auto-mode-alist '("\\.org$" . org-mode))
(define-key global-map "\C-cl" 'org-store-link)
(define-key global-map "\C-ca" 'org-agenda)
(setq org-log-done t)

;; For Easter calculation
(defun da-easter (year)
  "Calculate the date for Easter Sunday in YEAR. Returns the date in the
Gregorian calendar, ie (MM DD YY) format."
  (let* ((century (1+ (/ year 100)))
         (shifted-epact (% (+ 14 (* 11 (% year 19))
                              (- (/ (* 3 century) 4))
                              (/ (+ 5 (* 8 century)) 25)
                              (* 30 century))
                           30))
         (adjusted-epact (if (or (= shifted-epact 0)
                                 (and (= shifted-epact 1)
                                      (< 10 (% year 19))))
                             (1+ shifted-epact)
                           shifted-epact))
         (paschal-moon (- (calendar-absolute-from-gregorian
                           (list 4 19 year))
                          adjusted-epact)))
    (calendar-dayname-on-or-before 0 (+ paschal-moon 7))))


(defun da-easter-gregorian (year)
  (calendar-gregorian-from-absolute (da-easter year)))

(defun calendar-days-from-easter ()
"When used in a diary sexp, this function will calculate how many days
are between the current date (DATE) and Easter Sunday."
(- (calendar-absolute-from-gregorian date)
(da-easter (calendar-extract-year date))))

; For org appointment reminders
(defun djcb-popup (msg)
"Show a popup if we're on X, or echo it otherwise; TITLE is the title
of the message, MSG is the context. Optionally, you can provide an ICON and
a sound to be played"

;;(interactive)
;;    (if (eq window-system 'x)
    ;;(shell-command (concat "/usr/bin/xmessage" msg))
    (call-process "/usr/bin/xmessage" msg)
    ;; text only version
    ;;(message (concat title ": " msg)))
)
;; the appointment notification facility
(setq
  appt-message-warning-time 5 ;; warn 5 min in advance

  appt-display-mode-line t     ;; show in the modeline
  appt-display-format 'window) ;; use our func
(appt-activate 1)              ;; active appt (appointment notification)
(display-time)                 ;; time display is required for this...

 ;; update appt each time agenda opened

(add-hook 'org-finalize-agenda-hook 'org-agenda-to-appt)

;; our little façade-function for djcb-popup
 (defun djcb-appt-display (min-to-app new-time msg)
    (djcb-popup (format "Appointment in %s minute(s)" min-to-app) msg ))
  (setq appt-disp-window-function (function djcb-appt-display))