I'm clarifying "with metacity" because I assume that's what is disqualifying the advice I found on multiple posts. I had this fixed back on ubuntu 16 with a different pc but I can't for the life of me remember how I did it.
I've tried
gsettings set org.gnome.desktop.interface clock-show-date trueI've also looked for it in gnome-tweaks but apparently version 3.28.1 does not have the top menu (it also lost the extensions and workspaces menus now that I look at it). Maybe I should get another version of gnome-tweak-tools...
But still, if I understand correctly, gnome-tweaks is only a gui for gsettings and, right now, I have my terminal saying
gsettings get org.gnome.desktop.interface clock-show-date
truewhile my tray has no date on it...
11 Answer
run the below command to show the date
gsettings set com.canonical.indicator.datetime show-date true
alternatively use dconf-editor GUI tool and search for datetime and make your changes accordingly..