> Please provide mode details about what you tried.
OK, I will try. I start emacs with
emacs -Q -l emacs_init/minimal-org.el
Here, minimal-org.el has the following contents:
;; Activate debugging.
(setq debug-on-error t
debug-on-signal nil
debug-on-quit nil
icalendar-export-sexp-enumeration-days 400)
;; Add latest Org mode to load path.
(custom-set-variables
'(package-selected-packages
'(org-plus-contrib)))
In this setup, `M-x version` and `M-x org-version` bring up the following
information:
GNU Emacs 28.2 (build 2, x86_64-pc-linux-gnu, GTK+ Version 3.24.20, cairo
version 1.16.0) of 2023-06-23
Org mode version 9.5.5 (release_9.5.5 @
/snap/emacs/current/usr/share/emacs/28.2/lisp/org/)
`org-time-stamp` gives `<2023-07-24 Mo>`.
I create a minimal org-file `test.org` with the following contents:
* Test 1
%%(org-anniversary 2022 07 23) Test1
* Test 2
%%(org-anniversary 2022 07 25) Test2 %d
I open this file in emacs and hit `C-c C-e c f` to export it to icalendar. The
file `test.ics` has the following contents:
BEGIN:VCALENDAR
VERSION:2.0
X-WR-CALNAME:test
PRODID:-//Marcus//Emacs with Org mode//EN
X-WR-TIMEZONE:CEST
X-WR-CALDESC:
CALSCALE:GREGORIAN
END:VCALENDAR
