I have the problem that I need to share the same event with multiple different groups of people.
For example, I need to share the dates of my firefighting drills with my office and my partner and sometimes even with my sport club. It would be amazing if it would be possible to elect multiple calenders when creating a new even or edit an existing one. Maybe there could even be some kind of "logical calendar" as shorthand to select a specific predefined set of calenders.