I'm missing the calendar shortcut in the clock applet (statusbar in Budgie).
Formerly there were two menu items when clicking on the clock applet , "settings" and "calendar". Now there's only "settings" left.
The calendar itself (gnome) is working fine.
Can I get it back, somehow?

This was removed from Budgie because of how mimetype handlers work. If there is no calendar handler application installed on the system, which is the case on some distros that Budgie is distributed in, it will open a text editor instead. And it would sometimes do this even if you did have a calendar application installed.

Thanks for the info.
A bit sad because I have to admit that this magic little detail was always overwhelmingly encouraging for me in terms of user-friendliness. One click, and then another - my choice! - and then appeared not only an arbitrary overview (like the one in Raven or on Windows), but my own nextcloud synchronized calendar instead!
When it first happened I could barely believe it, and let me instantly fall in love with the OS and Budgie.