2023 Schedule (Revised) « All Events This event has passed. Extreme Battle of Nashville Open Regional Karate Tournament April 17, 2021 @ 8:00 am - 5:00 pm Derby Championship Open Regional Martial Arts Tournament » Add to calendar Google Calendar iCalendar Outlook 365 Outlook Live Details Date: April 17, 2021 Time: 8:00 am - 5:00 pm Website: Sign Up Here