Once an item (date, appt, meeting etc) has been saved. I’d like to be able to change the calendar for it without having to put in all over and then deleting the original one. 

I have to share certain calendars with certain people so I have Multiple calendars attached to this. But I need them all displayed in my own personal calendar. 

Depending on the global iOS appearance (light / dark) switch between two configurable themes.

My phone is automatically switching between light and dark depending on the time of the day. Would be nice if the app could adapt to this setting as the widget does.