Some other German ones:

Nick for Niklas and Nick/Niko for Nikolaus
Matze for Martin
Sepp for Josef
Kathi, Katta and Kadda for Katharina and Kathrin
Alex for Alexander and Alexandra
Vicki for Viktoria
Schorsch (not spoken with an English accent) for Georg
Bert for Berthold
Basti and Sebi for Sebastian
Gabi for Gabriele
Siggi for Siegfried and Sieglinde
Uschi for Ursula

And of course English nicknames for German names, e.g. Jules for Julian, Dave for David.

As for the clock face, a 12 hour face is much easier to read at a glance or from a distance.

To add one datapoint: I actually installed LibreOffice just now just to try it out. I went via

Format > Page Style > General [this tab was open by default] > Orientation: Landscape

If that is the correct way, then it was, IMO, hard to miss and fast to find. If it was the wrong way*, however then I’d say I find the menu labels misleading.

*I am not quite sure, because the dialogue had the Title “Page Style: Default Page Style”, so I would have expected pages in all new documents to now start out in landscape orientation, but I opened a new document, and the page was in portrait orientation. So, I think I did what I tried to do - change orientation only in the current document - in spite of that (misleading, thus proving your point?) dialogue title.

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Everyone has a plan until they get stabbed in the belly by a smaller opponent.