----- Original Message -----
On Mon, 2016-03-14 at 14:28 +0100, Andreas Nilsson wrote:
> I tested again now, and it seems the world clock button goes away if
> gnome-clocks isn't installed.
> The shell calendar seems to work fine without evolution installed.
We do need to change it to launch GNOME Calendar, though... once that
moves into core.
That should be a one-liner in the default apps shipped by shared-mime-info.
You can test whether it works by changing the default in the Details ->
Default applications settings panel.