Eastern will host the 27th annual Panther Marching Band Festival from 8 a.m. to about 3:30 p.m. Saturday at O’Brien Stadium.

Twenty-one high school bands will compete for awards, a press release stated.

Bands will range in size from 35 to more than 150 members. They will perform at 15-minute intervals.

The following bands will perform from the 1A Class: Casey-Westfield, 8:15 a.m.; Bismarck-Henning, 8:30 a.m.; Iriquois-West, 8:45 a.m.; Watseka, 9 a.m.; Niantic-Harristown, 9:15 a.m.; El Paso, 9:30 a.m. and Atwood-Hammond, 9:45 a.m.

Schools competing in the 2A Class are: Blue Ridge, 10:15 a.m.; Okaw Valley, 10:30 a.m.; East Richland, 10:45 a.m.; Ridgeview, 11 a.m.; Mater Dei, 11:15 a.m.; Robinson, 11:30 a.m. and Newton, 11:45 a.m.

In the 3A Class, competing schools are: Streator Township, 1 p.m.; Charleston, 1:15 p.m.; Belleville West, 1:30 p.m. and Centralia, 1:45 p.m.

The 4A Class includes: Alton, 2:15 p.m.; Marion, 2:30 p.m. and Centennial, 2:45 p.m.

The Marching Blue, Eastern’s marching band, will present an exhibition performance at 3 p.m.