All "All Day Events" as single event.
All "All Day Events" of the same calendar occurring on the same day, should appear as a single event, with commas.
For example: "Monday: Good Friday, Sisters' Day"
"Monday: Birthday: Ann, John, Mary".
Will not make it in the next version, planned for the following one
Rob T commented
I like this. It would certainly save space. Although I'd suggest using / or ; as a separator, rather than a comma.