fullcalendar

I decided to use standard-version of fullcalendar.io, mainly because because of its features to integrate multiple iCalendar / ics resources with recurring events. Unfortunately the developer experience was rather poor. I guess this is because of their “premium” versions.
When I tried to map the external ics-Calendars to internal calendars, I guess this is something similar to what they call ‘resources’ in their premium versions, I found myself in a very hacky solution.
Next time I would rather go with tui calendar