Yep, sorry I forgot to mark it solved.
Thanks again!
that made the difference!
update: using the the snippet (method two of the knowledgebase howto) works – partly.
it only displays the right name format when a user directly clicks on the link containing &eventDisplay=month. So that’s the workaround for now.
never mind the mentioned dark background, that is solved.
thank you, @alaasalama!
now it is much closer. still not between the two, but looks better.
thanks again