I love in Trello the feature that let you view a calendar with all date assigned cards and drag and drop them to a new date. I think this would be an awesome feature for Dynalist.
I’m afraid that’s not what Dynalist is best at, it’s out of the our scope 
With that said, you can hook up Dynalist with your Google Calendar and drag and drop there.
Wow that is an awesome game changer. I never thought of that. Does it sync the changes you make back to Dynalist?
Unfortunately no, so ideally you would do all the editing in Dynalist and only use Google Calendar for reviewing and reminders (email, push notification, and SMS).