The version numbering scheme has been changed to year.month: https://wiki.documentfoundation.org/ReleasePlan

schon passiert: https://www.tagesschau.de/wirtschaft/unternehmen/letzter-post-flug-100.html

AndrOpen Office is an Android port of LibreOffice. It’s not on Fdroid, but Aurora has it. It works perfectly fine for me, although the UI is not android specific.

https://de.m.wikipedia.org/wiki/Volkstrauertag