Remember to cover the basics, that is, what you expected to happen and
what in fact did happen. You don't know how to make a good report? See
https://orgmode.org/manual/Feedback.html#Feedback
Your bug report will be posted to the Org mailing list.
------------------------------------------------------------------------
Add this:
* An appointment
SCHEDULED: <2026-04-18 sam. 13:00-17:00>
^
Put your cursor here => ^
Then S-<up> will cause this:
Debugger entered--Lisp error: (error "cl-ecase failed: 1, (minute hour day
month year)")
signal(error ("cl-ecase failed: 1, (minute hour day month year)"))
error("cl-ecase failed: %s, %s" 1 (minute hour day month year))
org-timestamp-change(1 nil updown)
org-timestamp-up(1)
funcall-interactively(org-timestamp-up 1)
call-interactively(org-timestamp-up)
org-shiftup(nil)
funcall-interactively(org-shiftup nil)
call-interactively(org-shiftup nil nil)
command-execute(org-shiftup)
Note that there is no error while trying to change the first hour.
Emacs : GNU Emacs 31.0.50 (build 1, x86_64-pc-linux-gnu, GTK+ Version 3.24.50,
cairo version 1.18.4)
of 2026-04-13
Package: Org mode version 10.0-pre (release_9.8.2-86-ge0bc51 @
/home/bzg/install/git/org/org-mode/lisp/)
--
Bastien Guerry
