Charles County Public Schools 2015-2016 Calendar https://charlescountypublics.tandem.co/ Key dates for Charles County Public Schools. en-us 3/24/16 - 3/28/16 Spring Break https://charlescountypublics.tandem.co/index.php?type=key_date&action=details&id=318 318-charlescountypublics@intand.com 6/8/16 Last Day of School https://charlescountypublics.tandem.co/index.php?type=key_date&action=details&id=319 319-charlescountypublics@intand.com