This is on their website.

The 2015 Hoosier Tire Midwest Sprint Car Series Schedule is in the final stage of development. The emerging race dates will be packaged and released soon! MSCS has a tradition of releasing its new schedule in January. Last year the schedule was released on the first day of January. This year the schedule is on target to be completed before the Christmas Holiday. To be the first to know it is suggested that you begin checking the series website at www.mscssprints.com on or before December 22nd