When Siri asks for a time, I just say "no time" and she creates the task with no due date.

Thanks, karat0007! Great tip.

What I would like to be able to do, but haven't figure out a way to make Siri/RTM do this, is to have a due DATE but no due TIME on the due date.

Hi rcamner,
It doesn't appear that it's possible to assign a due date but no due time via Siri right now, sorry.

We'll be keeping an eye on Siri's capabilities to see what task properties we can set in the future.

I'm hoping for the same thing as rcamner, hopefully this can get fixed soon.

Another tip is that you can add something to Siri using the verb "Remember" instead of "Remind me" if you want it added without a due date/time.

So "Remember to Buy Milk" will add a no-date/no-time reminder, without prompting you for additional information. "Remind me to Buy Milk" will ask for a due date and time (you can still say "No time" but that's an extra step).