If you're referring to the Spring Fling Crappie Tournament on Watts Bar .... it's on April 23rd/24th (see the first post, at the top of the page, on this forum).
The Teezur Tournament is usually in Nov, I think (and it's on Ky Lake, Big Sandy area). The Fall Brawl Crappie Tournament (Watts Bar) will be in mid to late Oct.
I don't know about any others, so perhaps someone else can give you dates on them. .........luck2ya ......cp