How to move a Stage on automatically within a Blueprint?

How to move a Stage on automatically within a Blueprint?

Hi,

I have a blueprint for Deals. If a Deal gets to the stage "Quality Lead", how can it be moved on automatically to a stage called "Contact Lead" after 30 days? I cant use an Automatic transition because there will be times when I still need the transition to be moved on manually by a CRM user before the 30 days expires.

What do you think?
Thanks