4.5 KiB
4.5 KiB
Fun with Org Mode Agenda Views
I use Org Mode extensively, including Agenda Views.
I have an anniversaries.org file for, well, anniversaries. I have
added it to the org-agenda-files list so that entries in there show
up in agenda views.
It contains some non-standard entries that some people might get a
giggle out of.
Discordian Holidays
%%(org-anniversary -1166 01 05) Today is Setting Orange, the 5th day of Chaos in the YOLD %d. Celebrate Mungday. %%(org-anniversary -1166 02 19) Today is Setting Orange, the 50th day of Chaos in the YOLD %d. Celebrate Chaoflux. %%(org-anniversary -1166 03 19) Today is Pungenday, the 5th day of Discord in the YOLD %d. Celebrate Mojoday. %%(org-anniversary -1166 05 03) Today is Pungenday, the 50th day of Discord in the YOLD %d. Celebrate Discoflux. %%(org-anniversary -1166 05 31) Today is Sweetmorn, the 5th day of Confusion in the YOLD %d. Celebrate Syaday. %%(org-anniversary -1166 07 15) Today is Sweetmorn, the 50th day of Confusion in the YOLD %d. Celebrate Confuflux. %%(org-anniversary -1166 08 12) Today is Prickle-Prickle, the 5th day of Bureaucracy in the YOLD %d. Celebrate Zaraday. %%(org-anniversary -1166 09 26) Today is Prickle-Prickle, the 50th day of Bureaucracy in the YOLD %d. Celebrate Bureflux. %%(org-anniversary -1166 10 24) Today is Boomtime, the 5th day of The Aftermath in the YOLD %d. Celebrate Maladay. %%(org-anniversary -1166 12 08) Today is Boomtime, the 50th day of The Aftermath in the YOLD %d. Celebrate Afflux.
Discworld
%%(org-anniversary 1957 5 24) The Glorious People's Republic of Treacle Mine Road: "Truth, Justice, Freedom, Reasonably-Priced Love and a Hard-Boiled Egg!"
Shitposting
%%(org-anniversary 0 12 23) Christmas Adam. Comes before Christmas Eve and is generally unsatisfying. %%(= 0 (calendar-days-from-easter)) Celebrate the rising of an undead horror from his tomb...
"Christmas Adam" came from a tumblr thread years ago.
"Celebrating the rising of an undead horror" came from a conversation between Charlie Stross and Nicholas Weaver on the Fediverse.
For the later we need a helper function to calculate the Date of Easter.
Calculate Easter
This is from the Org Mode FAQ: 17.8. How do I schedule events relative to Easter Sunday? Which points at da-kalender.el
;; from https://github.com/soren/elisp/blob/master/da-kalender.el
;; Copyright (c) 2018 Søren Lund <soren@lund.org>
;; This program is free software; you can redistribute it and/or modify
;; it under the terms of the GNU General Public License as published by
;; the Free Software Foundation; either version 3 of the License, or
;; (at your option) any later version.
(defun calendar-easter (year)
"Calculate the date for Easter Sunday in YEAR."
(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 calendar-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)
(calendar-easter (calendar-extract-year date))))We can then schedule things relative to Easter:
- Good Friday
<%%(= -2 (calendar-days-from-easter))>- Easter Sunday
<%%(= 0 (calendar-days-from-easter))>- Easter Monday
<%%(= 1 (calendar-days-from-easter))>