One of the most interesting features of the Events Calendar for LearnDash plugin is individual students and users can add their own calendar events which are only visible to them.
This is done from the main calendar page by clicking “add event”.

This opens up a modal window where the end-user can set their event title, link, toggle if the event is all day, start/end date, and use the color pickers to modify text and background colors.

Once the user is finished, they click “Save” and the event is immediately added to their calendar.