Hi Claus, I really like your template. Here are some hints from my side:
1. Intro-B10: There is a "r" missing in "Insert"
2. The days won't be changed to German. I get a "Onsdag" etc. the months work fine. (LibO 184.108.40.206). Maybe change the cell to "= x10" and the format to "Date" and "NNN".
3. Does the license fit the contest (CC4 to CC0)?
Here's my reply:
Ad. 1. : Spelling mistake :-( I've changed in new version.
Ad. 2. : Seems to be a 'bug' in the Windows version of LibO. Worked fine under Ubuntu. Any how, I changed the way it works. Please try again. If days don't change, try change start of week to Sunday, and then back. Very odd on Windows - I tried on German system - and when I retyped the formula for days - with exactly same formula - it changed to German. I have tried English, Danish, German, French, Greek, Hebrew and Polish on Ubuntu - all works. Let me know if it works on different L10n of Windows.
Ad. 3 : Bummer from my side. Of course if it should be a template distributed with LibO it should be CC0. I have changed the license.
I hope the Calendar can help promote LibreOffice Calc.