Sachem Central School District 2015-2016 Calendar https://sachemcentral.tandem.co/ Key dates for Sachem Central School District. en-us 9/1/15 First Day https://sachemcentral.tandem.co/index.php?type=key_date&action=details&id=399 399-sachemcentral@intand.com 11/25/15 - 11/27/15 Thanksgiving Break https://sachemcentral.tandem.co/index.php?type=key_date&action=details&id=400 400-sachemcentral@intand.com 12/24/15 - 1/1/16 Christmas Break https://sachemcentral.tandem.co/index.php?type=key_date&action=details&id=401 401-sachemcentral@intand.com 2/15/16 - 2/19/16 Winter Break https://sachemcentral.tandem.co/index.php?type=key_date&action=details&id=402 402-sachemcentral@intand.com 4/25/16 - 4/29/16 Spring Break https://sachemcentral.tandem.co/index.php?type=key_date&action=details&id=403 403-sachemcentral@intand.com 6/23/16 Last Day of School https://sachemcentral.tandem.co/index.php?type=key_date&action=details&id=404 404-sachemcentral@intand.com