This would be great. The app Things does this already and it’s especially useful for a project where you may have a final deadline, say January 1, 2019 but anticipate numerous intermediate deadlines.
Example: Notebook named Bio paper - due 1/1/2019.
[. ]topic due 9/10/2018
[ ]first rough draft due 10/1/2018
[ ]second rough draft due 11/1/2018
each of these reminders would be set from within the app (not just written out) so that you would recieve email/Evernote reminders.
if you’re interested in this feature, Things does this already and I’m keeping it around for only this reason. If Evernote implements, I will discontinue using Things.