It would be nice if it's possible to edit single instances of repeating events (for example if the the time for a specific occurence of that event has changed) or to be able to delete single instances of repeating events (like during holidays etc.)
This is a must in Calendar events feature, right now if i want to delete one event in the selected event series, then the whole series is deleted too.
Outlook and Google Calendar has this great features.
Keep good work for the world!
Cheers