You have two options of adding events to a course:
Within the context of a course, you can create multiple different events. E.g., Workshop 1, 2, and 3. Events are compulsory for course completion, so by creating three workshops, you are required to attend each of the events to complete the course.
You may also have a single event. E.g., Workshop 1, with multiple dates for that event. For this option, the learner will only need to select one of the dates to attend to complete the course.
How to Add More Dates to an Event?
Go to the course edit page
Go to "Structure" tab > Add "Event" to the course
Click on "Add a date" to add a specific date to the event
Then put in the required "Date", "Time", and "Location"
If you wish to add multiple dates to an event, click on the first event that you have created on the left > Click on the "···" button on the right > Then click on "Duplicate"
Once you have duplicated the first event, add in the second "Date", "Time", and "Location" options
And you should be able to see there are two date options for an event (Note: For this, the learner will only need to choose one of the dates to attend in order to complete the course)
Additional Information:
Deleting Events