YourPace Calendar Deadlines

[Infinite-Telephone52]

For the Summer I calendar, for example, it says last day to add a class is June 20, but then last day to submit drafts is June 23. Does that only give us 3 days if I were to add a class on June 20? The date classes end for this session is June 30, so I'm confused how this actually works. I'm assuming you can still submit finals just not drafts past the deadline. Can anyone clarify, please? Thank you!