Hi,

Rodrigo Morales <moralesrodrigo1100@gmail.com> writes:

> Do any of you know whether there is a repository that contain Org files
> whose main purpose is to list important dates of a given context
> (specific countries, areas such as technology, biology, mathematics,
> computer science, etc.)?

You can use the diary for this and include those entries in your agenda.
Here are some settings:

 '(org-agenda-include-diary t)
 '(calendar-mark-diary-entries-flag t)
 '(calendar-mark-holidays-flag t)
 '(calendar-view-holidays-initially-flag t)
 '(calendar-view-diary-initially-flag t)

 '(holiday-other-holidays
   '((holiday-fixed 1 1 "New Year's Day")
     (holiday-fixed 2 14 "Valentine's Day")
     (holiday-fixed 3 19 "Dia del Padre")
     (holiday-fixed 4 1 "April Fools' Day")
     (holiday-float 5 0 2 "Muttertag")
     (holiday-float 5 0 1 "Dia de la Madre")
     (holiday-easter-etc 39 "Vatertag")
     (holiday-fixed 5 30 "Vatertag")
     (holiday-fixed 10 31 "Halloween")))
 '(htmlize-output-type 'inline-css)

For custom diary files you might also want:

  (add-hook 'diary-list-entries-hook 'diary-include-other-diary-files)
  (add-hook 'diary-mark-entries-hook 'diary-mark-included-diary-files)

Best wishes,
Arne
-- 
Unpolitisch sein
heißt politisch sein
ohne es zu merken