Ability to create aggregate calendars of different event types from different calendars

We're using team calendars since 2 years now and we still struggle to apply the use cases we have with to the features team calendars do provide.

Out of recent discussions I'd like to propose a new feature that would help us address a good percentage of the potential use cases and IMHO would also help a lot of other customers.

• As a user I want to add my vacation days only once to my own calendar so that the multiple teams I'm part of can pick it and make an 'aggregated calendar' per team out of it
• As a team lead I want to be able to pick the vacation calendars of my team members once and create a named calendar out of it, so that I can export it to other calendar systems like Outlook as a single operation.
• As a production site space admin I want to pick multiple calendars from the hr/learning/xxx department and aggregate it into a single Site Events calendar
• As a production site reader I want to subscribe to a named site calender with a single click, I want to be able to export this calendar with a single operation
• As global HR department I want to be able to pick the event calendars of my local HR departments and publish them as a single named HR calendar
• As a user being interested in global HR events I want to subscribe to a named site calender with a single click, I want to be able to export this calendar with a single operation.

Does this make sense? AFAICS I could solve a series of requests of my users having this aggregation feature. Solving the vacation calendar problem would be a killer feature...

I'm open to discuss the details with you...