wishlist: Merging calendars

[chrysn]

Some events have parallel calendars for different "tracks". For example, at IETF105 there is the calendar of official events, and a parallel calendar of unofficial side meetings.

It Would Be Nice If there was a way to have giggity display both in overlay (just displaying events from both in a single view, with the event details indicating the source when there are multiple calendars).

A first iteration may not even need capabilities for creating such a composite-calendar event from GUI input, just having multiple calendars from a JSON would be a good starting point.

[joker234]

Same applies to e.g. the State of the Map 2019. They have separate pretalxs for Program and Academic Program.