I think it would be very useful that the events could have an icon that allows to individualize or visually characterize them so that they are more easily identifiable.
Following the favicon concept for web sites, it seems to me that something similar could be implemented for calendar events (and tasks?).

My proposed implementation is simple: if an event contains an attached image file called favicon.*, Business Calendar should interpret it as the favicon of the event and should display it in the way it is determined.
I propose to incorporate a switch to enable or disable favicon detection.
I also propose to analyze (and set) where the favicons will be displayed in each view, according to the convenience in each of them.

Greetings to all members of the Business Calendar community !