Well I think I will choose ghost, thanks for all your suggestions.
Now I need to embed events/calendars, in a easy way, but having a separated website isn't a big issue.
Self hosting is really something I care about.
And no, I don't want to host calendars or stuff like that, I just want an easy to look at calendar "widget" where (when identified) people can add event to it, like "birthday of Patrick".
Boost appreciated (since the first post is kinda obscure)
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