From NJSIAA, 12/11:
Baseball and softball pitchers and catchers may begin practicing on Friday, March 26, 2021. Team practices for all sports will begin on Thursday, April 1, 2021. Competition will start on Monday, April 19, 2021, and the season will end on Sunday, June 20, 2021. NJSIAA post-season will start Tuesday, June 1, 2021, and conclude Sunday, June 20, 2021; however teams not participating in the post-season may continue to play regular season games through the end of the season, as long as they do not exceed the maximum number of regular season games permitted.