Are you aware of any? Preferably a self-hosted open source app. Preferably with unlimited "hierarchy" of calendars (like, if
calendar A is a child of
calendar B then requesting a
ics feed from
calendar B should also include all events in
A). I was thinking of something like a mailman but for calendars (probably also manageable through email exchange).
- calagator seems to have some issues with recurring events (like, "every M, W at 3pm")
- teamup seems to have these features, however they only allow very limited number of sub-calendars and only hierarchy of depth two, afaik