Hi list,

i often use shift with left or right arrow keys to change the date in
org-(super-)agenda. These key combinations can be used with prefix C-u and
double prefix C-u C-u.

In my setup in org 9.4 the behaviour is like this for a scheduled date
without scheduled time (for example SCHEDULED: <2020-10-27>:
C-u S-left: Date changes to date before (26th)
C-u S-right: Date does not change
C-u C-u S-left: Date changes to date before (26th)
C-u C-u: S-right: Date does not change

I would prefer this behaviour instead (my proposal):
C-u S-left: Add a default time (e.g. 6:00)
C-u S-right: Add a default time (e.g. 6:00)
C-u C-u S-left: Add a default time (e.g. 6:00)
C-u C-u: S-right: Add a default time (e.g. 6:00)

Scheduled date+time Timestamps can afterwards be changed as expected with
C-u prefix(es).

What I found out until now:
( org-schedule nil "12:00" ) adds a time 12:00 to a SCHEDULED date property.
(if (< (length (org-entry-get nil "SCHEDULED")) 16) (print
'scheduled_time_missing) (print 'scheduled_time_existent))
org-timestamp-has-time-p: could maybe better be used instead for finding
out if time is not present.

I think this would be a better default behaviour or the current behaviour
might even be a bug.

   Thanks, Martin :)