San Dimas High School 2026-2027 Calendar https://sandimashigh.tandem.co/ Key dates for San Dimas High School. en-us 8/10/26 - 8/11/26 School Check In https://sandimashigh.tandem.co/index.php?type=key_date&action=details&id=64096 64096-sandimashigh@intand.com 8/17/26 First Day of School https://sandimashigh.tandem.co/index.php?type=key_date&action=details&id=64097 64097-sandimashigh@intand.com 8/19/26 Collaboration Day (2:25pm Release) https://sandimashigh.tandem.co/index.php?type=key_date&action=details&id=64098 64098-sandimashigh@intand.com 8/24/26 Back to School Night https://sandimashigh.tandem.co/index.php?type=key_date&action=details&id=64099 64099-sandimashigh@intand.com 8/28/26 Minimum Day (12:59pm Release) https://sandimashigh.tandem.co/index.php?type=key_date&action=details&id=64100 64100-sandimashigh@intand.com 9/2/26 Collaboration Day (2:25pm Release) https://sandimashigh.tandem.co/index.php?type=key_date&action=details&id=64101 64101-sandimashigh@intand.com 9/7/26 Labor Day (No School) https://sandimashigh.tandem.co/index.php?type=key_date&action=details&id=64078 64078-sandimashigh@intand.com 9/11/26 Rally Schedule https://sandimashigh.tandem.co/index.php?type=key_date&action=details&id=65057 65057-sandimashigh@intand.com 9/16/26 Collaboration Day (2:25pm Release) https://sandimashigh.tandem.co/index.php?type=key_date&action=details&id=64102 64102-sandimashigh@intand.com 9/25/26 Renaissance Schedule https://sandimashigh.tandem.co/index.php?type=key_date&action=details&id=65056 65056-sandimashigh@intand.com 10/2/26 No School https://sandimashigh.tandem.co/index.php?type=key_date&action=details&id=64221 64221-sandimashigh@intand.com 10/2/26 Staff Development Day https://sandimashigh.tandem.co/index.php?type=key_date&action=details&id=64216 64216-sandimashigh@intand.com 10/7/26 Collaboration Day (2:25pm Release) https://sandimashigh.tandem.co/index.php?type=key_date&action=details&id=64103 64103-sandimashigh@intand.com 10/12/26 Indigenous Peoples Day https://sandimashigh.tandem.co/index.php?type=key_date&action=details&id=64079 64079-sandimashigh@intand.com 10/15/26 Great Shakeout https://sandimashigh.tandem.co/index.php?type=key_date&action=details&id=64218 64218-sandimashigh@intand.com 10/16/26 First Quarter Ends https://sandimashigh.tandem.co/index.php?type=key_date&action=details&id=64217 64217-sandimashigh@intand.com 10/21/26 Collaboration Day (2:25pm Release) https://sandimashigh.tandem.co/index.php?type=key_date&action=details&id=64203 64203-sandimashigh@intand.com 10/22/26 Rally Schedule https://sandimashigh.tandem.co/index.php?type=key_date&action=details&id=65058 65058-sandimashigh@intand.com 10/23/26 Minimum Day (12:59pm Release) https://sandimashigh.tandem.co/index.php?type=key_date&action=details&id=65059 65059-sandimashigh@intand.com 10/29/26 Minimum Day (12:59pm Release) https://sandimashigh.tandem.co/index.php?type=key_date&action=details&id=64219 64219-sandimashigh@intand.com 10/29/26 Parent Conferences https://sandimashigh.tandem.co/index.php?type=key_date&action=details&id=64220 64220-sandimashigh@intand.com 10/30/26 No School https://sandimashigh.tandem.co/index.php?type=key_date&action=details&id=64251 64251-sandimashigh@intand.com 10/31/26 Halloween https://sandimashigh.tandem.co/index.php?type=key_date&action=details&id=64080 64080-sandimashigh@intand.com 11/1/26 Daylight Saving Time Ends https://sandimashigh.tandem.co/index.php?type=key_date&action=details&id=64082 64082-sandimashigh@intand.com 11/4/26 Collaboration Day (2:25pm Release) https://sandimashigh.tandem.co/index.php?type=key_date&action=details&id=64204 64204-sandimashigh@intand.com 11/11/26 Veterans Day (No School) https://sandimashigh.tandem.co/index.php?type=key_date&action=details&id=64081 64081-sandimashigh@intand.com 11/13/26 Rally Schedule https://sandimashigh.tandem.co/index.php?type=key_date&action=details&id=65060 65060-sandimashigh@intand.com 11/18/26 Collaboration Day (2:25pm Release) https://sandimashigh.tandem.co/index.php?type=key_date&action=details&id=64205 64205-sandimashigh@intand.com 11/23/26 - 11/27/26 Thanksgiving Break (No School) https://sandimashigh.tandem.co/index.php?type=key_date&action=details&id=64222 64222-sandimashigh@intand.com 11/26/26 Thanksgiving https://sandimashigh.tandem.co/index.php?type=key_date&action=details&id=64083 64083-sandimashigh@intand.com 12/2/26 Collaboration Day (2:25pm Release) https://sandimashigh.tandem.co/index.php?type=key_date&action=details&id=64206 64206-sandimashigh@intand.com 12/16/26 Collaboration Day (2:25pm Release) https://sandimashigh.tandem.co/index.php?type=key_date&action=details&id=64207 64207-sandimashigh@intand.com 12/17/26 Finals-Block Schedule (Periods 1, 2, 3, 0) https://sandimashigh.tandem.co/index.php?type=key_date&action=details&id=64223 64223-sandimashigh@intand.com 12/17/26 Minimum Day (12:55pm Release) https://sandimashigh.tandem.co/index.php?type=key_date&action=details&id=64226 64226-sandimashigh@intand.com 12/18/26 Finals-Block Schedule (Periods 4, 6, 7, 8) https://sandimashigh.tandem.co/index.php?type=key_date&action=details&id=64224 64224-sandimashigh@intand.com 12/18/26 Minimum Day (12:55pm Release) https://sandimashigh.tandem.co/index.php?type=key_date&action=details&id=64225 64225-sandimashigh@intand.com 12/18/26 Second Quarter Ends https://sandimashigh.tandem.co/index.php?type=key_date&action=details&id=64229 64229-sandimashigh@intand.com 12/21/26 - 12/25/26 Winter Break (No School) https://sandimashigh.tandem.co/index.php?type=key_date&action=details&id=64230 64230-sandimashigh@intand.com 12/25/26 Christmas Day https://sandimashigh.tandem.co/index.php?type=key_date&action=details&id=64084 64084-sandimashigh@intand.com 12/28/26 - 1/1/27 Winter Break (No School) https://sandimashigh.tandem.co/index.php?type=key_date&action=details&id=64231 64231-sandimashigh@intand.com 1/1/27 New Year's Day https://sandimashigh.tandem.co/index.php?type=key_date&action=details&id=64085 64085-sandimashigh@intand.com 1/6/27 Collaboration Day (2:25pm Release) https://sandimashigh.tandem.co/index.php?type=key_date&action=details&id=64208 64208-sandimashigh@intand.com 1/15/27 Rally Schedule https://sandimashigh.tandem.co/index.php?type=key_date&action=details&id=65061 65061-sandimashigh@intand.com 1/18/27 Martin Luther King Day (No School) https://sandimashigh.tandem.co/index.php?type=key_date&action=details&id=64232 64232-sandimashigh@intand.com 1/20/27 Collaboration Day (2:25pm Release) https://sandimashigh.tandem.co/index.php?type=key_date&action=details&id=64209 64209-sandimashigh@intand.com 2/3/27 Collaboration Day (2:25pm Release) https://sandimashigh.tandem.co/index.php?type=key_date&action=details&id=64210 64210-sandimashigh@intand.com 2/8/27 Lincoln's B-Day Observed (No School) https://sandimashigh.tandem.co/index.php?type=key_date&action=details&id=64233 64233-sandimashigh@intand.com 2/14/27 Valentine's Day https://sandimashigh.tandem.co/index.php?type=key_date&action=details&id=64087 64087-sandimashigh@intand.com 2/15/27 Presidents' Day (No School) https://sandimashigh.tandem.co/index.php?type=key_date&action=details&id=64088 64088-sandimashigh@intand.com 2/17/27 Collaboration Day (2:25pm Release) https://sandimashigh.tandem.co/index.php?type=key_date&action=details&id=64211 64211-sandimashigh@intand.com 3/3/27 Collaboration Day (2:25pm Release) https://sandimashigh.tandem.co/index.php?type=key_date&action=details&id=64212 64212-sandimashigh@intand.com 3/4/27 Future Saints Night/Open House https://sandimashigh.tandem.co/index.php?type=key_date&action=details&id=65062 65062-sandimashigh@intand.com 3/5/27 Minimum Day (12:59pm Release) https://sandimashigh.tandem.co/index.php?type=key_date&action=details&id=65063 65063-sandimashigh@intand.com 3/11/27 Rally Schedule https://sandimashigh.tandem.co/index.php?type=key_date&action=details&id=65064 65064-sandimashigh@intand.com 3/12/27 No School https://sandimashigh.tandem.co/index.php?type=key_date&action=details&id=64234 64234-sandimashigh@intand.com 3/14/27 Daylight Saving Time Begins https://sandimashigh.tandem.co/index.php?type=key_date&action=details&id=64089 64089-sandimashigh@intand.com 3/17/27 Collaboration Day (2:25pm Release) https://sandimashigh.tandem.co/index.php?type=key_date&action=details&id=64213 64213-sandimashigh@intand.com 3/17/27 St. Patrick's Day https://sandimashigh.tandem.co/index.php?type=key_date&action=details&id=64090 64090-sandimashigh@intand.com 3/19/27 Third Quarter Ends https://sandimashigh.tandem.co/index.php?type=key_date&action=details&id=64235 64235-sandimashigh@intand.com 3/22/27 Fourth Quarter Begins https://sandimashigh.tandem.co/index.php?type=key_date&action=details&id=65093 65093-sandimashigh@intand.com 3/28/27 Easter https://sandimashigh.tandem.co/index.php?type=key_date&action=details&id=64091 64091-sandimashigh@intand.com 3/29/27 - 4/2/27 Spring Break (No School) https://sandimashigh.tandem.co/index.php?type=key_date&action=details&id=64236 64236-sandimashigh@intand.com 4/16/27 Collaboration Day (2:25pm Release) https://sandimashigh.tandem.co/index.php?type=key_date&action=details&id=64214 64214-sandimashigh@intand.com 4/28/27 Collaboration Day (2:25pm Release) https://sandimashigh.tandem.co/index.php?type=key_date&action=details&id=64215 64215-sandimashigh@intand.com 5/1/27 National Signing Day https://sandimashigh.tandem.co/index.php?type=key_date&action=details&id=64237 64237-sandimashigh@intand.com 5/5/27 Cinco De Mayo https://sandimashigh.tandem.co/index.php?type=key_date&action=details&id=64092 64092-sandimashigh@intand.com 5/18/27 Renaissance Schedule https://sandimashigh.tandem.co/index.php?type=key_date&action=details&id=64238 64238-sandimashigh@intand.com 5/19/27 Minimum Day (12:59pm Release) https://sandimashigh.tandem.co/index.php?type=key_date&action=details&id=64239 64239-sandimashigh@intand.com 5/19/27 SDCP Presentations https://sandimashigh.tandem.co/index.php?type=key_date&action=details&id=64243 64243-sandimashigh@intand.com 5/20/27 Minimum Day (12:59pm Release) https://sandimashigh.tandem.co/index.php?type=key_date&action=details&id=64240 64240-sandimashigh@intand.com 5/20/27 SDCP Presentations https://sandimashigh.tandem.co/index.php?type=key_date&action=details&id=64242 64242-sandimashigh@intand.com 5/21/27 Minimum Day (12:59pm Release) https://sandimashigh.tandem.co/index.php?type=key_date&action=details&id=64241 64241-sandimashigh@intand.com 5/28/27 Senior Check Out https://sandimashigh.tandem.co/index.php?type=key_date&action=details&id=64244 64244-sandimashigh@intand.com 5/31/27 Memorial Day (No School) https://sandimashigh.tandem.co/index.php?type=key_date&action=details&id=64093 64093-sandimashigh@intand.com 6/2/27 Finals Block Schedule (Periods 1, 2, 3, 0) https://sandimashigh.tandem.co/index.php?type=key_date&action=details&id=64245 64245-sandimashigh@intand.com 6/2/27 Minimum Day (12:55pm Release) https://sandimashigh.tandem.co/index.php?type=key_date&action=details&id=64248 64248-sandimashigh@intand.com 6/3/27 Finals Block Schedule (Periods 4 , 6, 7, 8) https://sandimashigh.tandem.co/index.php?type=key_date&action=details&id=64246 64246-sandimashigh@intand.com 6/3/27 Fourth Quarter Ends https://sandimashigh.tandem.co/index.php?type=key_date&action=details&id=64247 64247-sandimashigh@intand.com 6/3/27 Minimum Day (12:55pm Release) https://sandimashigh.tandem.co/index.php?type=key_date&action=details&id=64249 64249-sandimashigh@intand.com 6/7/27 Summer School Begins https://sandimashigh.tandem.co/index.php?type=key_date&action=details&id=64250 64250-sandimashigh@intand.com 6/19/27 Juneteenth (No School) https://sandimashigh.tandem.co/index.php?type=key_date&action=details&id=64094 64094-sandimashigh@intand.com 7/4/27 Independence Day (No School) https://sandimashigh.tandem.co/index.php?type=key_date&action=details&id=64095 64095-sandimashigh@intand.com