other tip, maybe it can be usefull to have a general setting that works over all calendars that limits the number of appointments shown.
I like to have differents icons for each event, so don't really want them in 1 field.

For example:
Work calendar: 1week ahead, 5events planned, show 3
Birthday/personal calender: 3days ahead, 2events planned, show 2
=>can take up to 5 places, so would be nice if we could limit to for example 3, then it shows first 3 events (for example 2 work, 1birthday)