University Of Chicago Laboratory Schools 2026-2027 Calendar https://ucls.tandem.co/ Key dates for University Of Chicago Laboratory Schools. en-us 8/31/26 - 9/4/26 Planning Week (Blackout Date) https://ucls.tandem.co/index.php?type=key_date&action=details&id=117174 117174-uchicagolaboratoryschools@intand.com 9/5/26 - 9/7/26 Labor Day Weekend (Blackout Date) https://ucls.tandem.co/index.php?type=key_date&action=details&id=117175 117175-uchicagolaboratoryschools@intand.com 9/8/26 First Day of Classes https://ucls.tandem.co/index.php?type=key_date&action=details&id=117176 117176-uchicagolaboratoryschools@intand.com 9/8/26 - 9/11/26 HS Co-Curricular Week #1 https://ucls.tandem.co/index.php?type=key_date&action=details&id=117211 117211-uchicagolaboratoryschools@intand.com 9/21/26 - 9/25/26 HS Co-Curricular Week #2 https://ucls.tandem.co/index.php?type=key_date&action=details&id=117212 117212-uchicagolaboratoryschools@intand.com 10/7/26 - 10/9/26 10th Grade Retreat https://ucls.tandem.co/index.php?type=key_date&action=details&id=117221 117221-uchicagolaboratoryschools@intand.com 10/12/26 October Break - No School https://ucls.tandem.co/index.php?type=key_date&action=details&id=117177 117177-uchicagolaboratoryschools@intand.com 10/16/26 - 10/18/26 Alumni Weekend (Blackout Date) https://ucls.tandem.co/index.php?type=key_date&action=details&id=117209 117209-uchicagolaboratoryschools@intand.com 10/26/26 - 10/30/26 HS Co-Curricular Week #3 https://ucls.tandem.co/index.php?type=key_date&action=details&id=117213 117213-uchicagolaboratoryschools@intand.com 11/6/26 PD Day (Blackout Date) https://ucls.tandem.co/index.php?type=key_date&action=details&id=117178 117178-uchicagolaboratoryschools@intand.com 11/16/26 - 11/18/26 HS Co-Curricular Week #4 https://ucls.tandem.co/index.php?type=key_date&action=details&id=117214 117214-uchicagolaboratoryschools@intand.com 11/19/26 - 11/20/26 HS Parent/Teacher Conference (No School for HS) https://ucls.tandem.co/index.php?type=key_date&action=details&id=117219 117219-uchicagolaboratoryschools@intand.com 11/21/26 - 11/29/26 Thanksgiving Break (Blackout Date) https://ucls.tandem.co/index.php?type=key_date&action=details&id=117179 117179-uchicagolaboratoryschools@intand.com 12/19/26 - 1/3/27 Winter Break (Blackout Date) https://ucls.tandem.co/index.php?type=key_date&action=details&id=117180 117180-uchicagolaboratoryschools@intand.com 1/4/27 - 1/8/27 HS Co-Curricular Week #5 https://ucls.tandem.co/index.php?type=key_date&action=details&id=117215 117215-uchicagolaboratoryschools@intand.com 1/18/27 MLK Day (Blackout Date) https://ucls.tandem.co/index.php?type=key_date&action=details&id=117181 117181-uchicagolaboratoryschools@intand.com 1/29/27 No School for HS (Grading Day) https://ucls.tandem.co/index.php?type=key_date&action=details&id=117220 117220-uchicagolaboratoryschools@intand.com 2/4/27 - 2/6/27 12th Grade Retreat https://ucls.tandem.co/index.php?type=key_date&action=details&id=117222 117222-uchicagolaboratoryschools@intand.com 2/6/27 Dance Competition (Blackout Date) https://ucls.tandem.co/index.php?type=key_date&action=details&id=117207 117207-uchicagolaboratoryschools@intand.com 2/12/27 February Break - No School https://ucls.tandem.co/index.php?type=key_date&action=details&id=117205 117205-uchicagolaboratoryschools@intand.com 2/15/27 PD Day (Blackout Date) https://ucls.tandem.co/index.php?type=key_date&action=details&id=117182 117182-uchicagolaboratoryschools@intand.com 2/16/27 - 2/19/27 HS Co-Curricular Week #6 https://ucls.tandem.co/index.php?type=key_date&action=details&id=117216 117216-uchicagolaboratoryschools@intand.com 3/13/27 - 3/21/27 Spring Break https://ucls.tandem.co/index.php?type=key_date&action=details&id=117183 117183-uchicagolaboratoryschools@intand.com 3/22/27 - 3/26/27 HS Co-Curricular Week #7 https://ucls.tandem.co/index.php?type=key_date&action=details&id=117217 117217-uchicagolaboratoryschools@intand.com 3/24/27 ArtsFest https://ucls.tandem.co/index.php?type=key_date&action=details&id=117223 117223-uchicagolaboratoryschools@intand.com 4/13/27 - 4/15/27 11th Grade Retreat https://ucls.tandem.co/index.php?type=key_date&action=details&id=117224 117224-uchicagolaboratoryschools@intand.com 4/16/27 PD Day (Blackout Date) https://ucls.tandem.co/index.php?type=key_date&action=details&id=117184 117184-uchicagolaboratoryschools@intand.com 4/19/27 April Break - No School https://ucls.tandem.co/index.php?type=key_date&action=details&id=117185 117185-uchicagolaboratoryschools@intand.com 4/20/27 - 4/23/27 HS Co-Curricular Week #8 https://ucls.tandem.co/index.php?type=key_date&action=details&id=117218 117218-uchicagolaboratoryschools@intand.com 4/30/27 - 5/2/27 Alumni Awards (Blackout Date) https://ucls.tandem.co/index.php?type=key_date&action=details&id=117210 117210-uchicagolaboratoryschools@intand.com 5/10/27 First Day of May Project https://ucls.tandem.co/index.php?type=key_date&action=details&id=117225 117225-uchicagolaboratoryschools@intand.com 5/22/27 [Updated] Rites of May (Blackout Date) https://ucls.tandem.co/index.php?type=key_date&action=details&id=117570 117570-uchicagolaboratoryschools@intand.com 5/29/27 - 5/31/27 Memorial Day Weekend (Blackout Date) https://ucls.tandem.co/index.php?type=key_date&action=details&id=117186 117186-uchicagolaboratoryschools@intand.com 6/5/27 UChicago Convocation (Blackout Date) https://ucls.tandem.co/index.php?type=key_date&action=details&id=117187 117187-uchicagolaboratoryschools@intand.com 6/10/27 Last Day of Classes https://ucls.tandem.co/index.php?type=key_date&action=details&id=117188 117188-uchicagolaboratoryschools@intand.com 6/18/27 - 6/20/27 Juneteenth Weekend (Blackout Date) https://ucls.tandem.co/index.php?type=key_date&action=details&id=117189 117189-uchicagolaboratoryschools@intand.com 7/3/27 - 7/5/27 4th of July Weekend (Blackout Date) https://ucls.tandem.co/index.php?type=key_date&action=details&id=117190 117190-uchicagolaboratoryschools@intand.com