Free or busy
I should be able to define/update the type of an event, such as free or busy
This is super important, especially for all-day events. If I add an all-day reminder it blocks out my whole day unless I can change the free/busy status.
This is super important feature to have. I have automatic silencer app, which follows my calendar by free/busy status, muting only busy. Specifically important for all-day events as otherwise sound is shut-off early morning and chances are that I figure out only later I missed important calls.