Apple Calendar: Share busy/nonbusy information for several calendars I have a set of calendars, which I would like to share together as busy/nonbusy. That is, I want others to see (on a single calendar) whether I am busy in any calendar at a given date or not.

This does not necessarily have to go through Apple Calendar, but I would like to keep using it. That is, if there's an external software, I hope I don't have to change too much of my current structure.

Nice-to-have: In case I'm busy, people could see which calendar caused that.

/EDIT

Several calendars are google-calanders that I read in, but then there is also some iCloud calendars (Standard iCloud + Facebook)
I recommend you try the Google for that.

The explanations on how to will take to much space in here, but if you follow the instructions here, it is explained nicely.