I use the due dates only as a day specific reminders. I have this tied to my calendar so they show in both Omnifocus and my calendar on that specific day. 90% of the time this does not require a time. Is there a way to turn off the due date time?
At what time would you expect an action without a due time to appear overdue? The answer to the question is usually what you should set your default due time to (and then let OmniFocus fill in that time automatically).
So you’re saying that if I have a day specific reminder thats not time specific, I would put the due date somewhere close to the end of that day? Say 11:00pm?
Yep. And since you mention that this applies to 90% of your actions, then you should make it your default in Preferences > Dates and Times so that you don’t have to specify it manually.
You can remove the notifications from any item individually via the inspector (see Mac screenshot below), or use OmniFocus Settings/Preferences to default them to off and then add custom notifications to the items you do want to be notified about.