Would it be possible to extend the Calendar widget with the fullcalendar droppable feature so that it is possible to drop external events from for instance a listview on a specific day on the calendar
I think that might be possible, although I think I don't have the time to implement this feature (got other widgets to fix/debug). Is it possible to create a PR on Github for this? https://github.com/mendix/Calendar
Do you mean this widget https://appstore.home.mendix.com/link/app/248/ ?