Hmmm, not sure. There has been one version with an issue on the date format, not sure if it possibly landed one way or another in 18.04. Do you have backports enabled? Need to get back to you on this. You can set your own date format in the new showtime btw from gsettings (dconf editor), according to this string formatting: https://valadoc.org/glib-2.0/GLib.DateTime.format.html By default, the month should show though.
Yeah, I made a mistake, date format (string formatting, not the settings from gui) can only be set from gsettings, not from GUI (atm). Curious to the output of locale date_fmt though.
Translations for budgie-extras are handled by transifex … so please can you review the current translations and provide updates where necessary. https://www.transifex.com/ubuntu-budgie/