The following are the first day of school dates for Butler County public school districts.

Allegheny-Clarion Valley School District: Aug. 21

Butler Area School District: Aug. 28

Freeport Area School District: Aug. 21

Karns City Area School District: Sep. 3

Knoch School District: Aug. 21

Mars Area School District: Aug. 22

Moniteau School District: Aug. 22

Seneca Valley School District: Aug. 22

Slippery Rock Area School District: Aug. 21