I have just had a user come and ask how to retrieve a meeting that was 'Saved as Draft'. We couldn't find it anywhere.
When composing a meeting you have the option to 'Save as Draft' but there is no view for draft entries.
When I tested with my own calendar I could only find a draft by remembering the date and finding it that way, but there should be a list of Draft Entries as this would be less ambiguous, and more consistent with the Mail interface
Looks like this idea was also raised a long time ago in the idea jam as well