Illinois High School Sports is preparing to play in 2021 High School Sports by: Jay Kidwell Posted: Jan 27, 2021 / 10:05 PM CST / Updated: Jan 27, 2021 / 10:05 PM CST Illinois High School Sports will be back in action in 2021, Basketball teams can begin practice immediately with Football starting in March. Spring sports will be played from April 5-June 19.