CannaCon moves up OKC event, attracts vendors Thu, 12/13/2018 - 12:00am A national convention company moved its event plans for Oklahoma City next year ahead several months because the local cannabis ...PLEASE LOG IN FOR PREMIUM CONTENT. Our website requires visitors to log in to view the best local news. Not yet a subscriber? Subscribe today! Read more about CannaCon moves up OKC event, attracts vendors