Re: [PATCH] Make display-time-mode time zone configurable

[Paul Eggert]

Mark Oteiza wrote:
> lots of time-related things are fragmented across Emacs.

Yes, too fragmented. People have added individual features without knowing about 
the other uses.

> This patch just conveniently exposes the ZONE feature in
> display-time-mode in the same way time-stamp-time-zone does in
> time-stamp.el.  Would it make sense to put a defcustom in (I guess)
> time.el and have time-stamp.el use it?

On second thought, probably not. time-stamp.el is about time stamps in files, 
where it makes sense to (for example) standardize on UTC time stamps for ease of 
sharing files with people in other time zones.

The proposed display-time-zone, on the other hand, is about time stamps in the 
user display. This makes less sense to me, as the user display should use 
consistent time stamps and there are many other ways to display time. I suppose 
the use case would be something like "Although for most purposes Emacs should 
behave as if the time zone is X, the mode line should sometimes but not always 
use time zone Y". Why would the user want that?

Does display-time-world address the use case you're interested in? If not, what 
is display-time-world missing?