An example of this would be Lunar phases. Currently, you would need to update each date individually.
It’d be nice to have a way to mass update the calendar for future dates. If I wanted to track lunar phases for moon(s), it’d be nice to be able to type in their rotation/name and have the Calendar add in the relevant information moving forward.
(Ie; Moon1 is full every 4 days, Moon2 is full every 8 days - push a button and it adds all the phases to the future days.)