Mercer Island School District 2019-2020 Calendar https://mercerisland.tandem.co/ Key dates for Mercer Island School District. en-us 8/26/19 - 8/27/19 New Teacher Orientation https://mercerisland.tandem.co/index.php?type=key_date&action=details&id=210 210-mercerisland@intand.com 8/28/19 Teacher Prep Day https://mercerisland.tandem.co/index.php?type=key_date&action=details&id=211 211-mercerisland@intand.com 8/29/19 Tech. Integration Day https://mercerisland.tandem.co/index.php?type=key_date&action=details&id=212 212-mercerisland@intand.com 8/30/19 Half Day Professional Development https://mercerisland.tandem.co/index.php?type=key_date&action=details&id=213 213-mercerisland@intand.com 9/2/19 Labor Day https://mercerisland.tandem.co/index.php?type=key_date&action=details&id=177 177-mercerisland@intand.com 9/3/19 Pre-Service Day https://mercerisland.tandem.co/index.php?type=key_date&action=details&id=214 214-mercerisland@intand.com 9/4/19 First Day of School Grades 1-12 https://mercerisland.tandem.co/index.php?type=key_date&action=details&id=215 215-mercerisland@intand.com 9/9/19 First Day of School Kindergarten https://mercerisland.tandem.co/index.php?type=key_date&action=details&id=216 216-mercerisland@intand.com 10/11/19 Professional Dev. (PD) Day: Half Day (PM) https://mercerisland.tandem.co/index.php?type=key_date&action=details&id=218 218-mercerisland@intand.com 10/11/19 Student Half Day https://mercerisland.tandem.co/index.php?type=key_date&action=details&id=217 217-mercerisland@intand.com 10/14/19 Columbus Day https://mercerisland.tandem.co/index.php?type=key_date&action=details&id=178 178-mercerisland@intand.com 10/31/19 Halloween https://mercerisland.tandem.co/index.php?type=key_date&action=details&id=179 179-mercerisland@intand.com 11/1/19 End of First Quarter (MIHS) https://mercerisland.tandem.co/index.php?type=key_date&action=details&id=219 219-mercerisland@intand.com 11/3/19 Daylight Saving Time Ends https://mercerisland.tandem.co/index.php?type=key_date&action=details&id=181 181-mercerisland@intand.com 11/11/19 Veteran's Day https://mercerisland.tandem.co/index.php?type=key_date&action=details&id=180 180-mercerisland@intand.com 11/18/19 Half-day Elementary Grading Day https://mercerisland.tandem.co/index.php?type=key_date&action=details&id=220 220-mercerisland@intand.com 11/25/19 - 11/27/19 Elementary Conferences (2.5 days) https://mercerisland.tandem.co/index.php?type=key_date&action=details&id=221 221-mercerisland@intand.com 11/25/19 - 11/27/19 No School: Elementary https://mercerisland.tandem.co/index.php?type=key_date&action=details&id=222 222-mercerisland@intand.com 11/27/19 End of First Trimester (IMS & Elem) https://mercerisland.tandem.co/index.php?type=key_date&action=details&id=223 223-mercerisland@intand.com 11/27/19 IMS/MIHS Student Half-day https://mercerisland.tandem.co/index.php?type=key_date&action=details&id=224 224-mercerisland@intand.com 11/27/19 MIHS Regular Start https://mercerisland.tandem.co/index.php?type=key_date&action=details&id=225 225-mercerisland@intand.com 11/27/19 Progress Report Prep (IMS) https://mercerisland.tandem.co/index.php?type=key_date&action=details&id=226 226-mercerisland@intand.com 11/28/19 Thanksgiving https://mercerisland.tandem.co/index.php?type=key_date&action=details&id=182 182-mercerisland@intand.com 11/28/19 - 11/29/19 Thanksgiving Break (No School) https://mercerisland.tandem.co/index.php?type=key_date&action=details&id=227 227-mercerisland@intand.com 12/23/19 - 1/3/20 Winter Break (No School) https://mercerisland.tandem.co/index.php?type=key_date&action=details&id=228 228-mercerisland@intand.com 12/25/19 Christmas Day https://mercerisland.tandem.co/index.php?type=key_date&action=details&id=183 183-mercerisland@intand.com 1/1/20 New Year's Day https://mercerisland.tandem.co/index.php?type=key_date&action=details&id=184 184-mercerisland@intand.com 1/6/20 School Resumes https://mercerisland.tandem.co/index.php?type=key_date&action=details&id=229 229-mercerisland@intand.com 1/20/20 Martin Luther King Day https://mercerisland.tandem.co/index.php?type=key_date&action=details&id=185 185-mercerisland@intand.com 1/22/20 - 1/24/20 MIHS Finals https://mercerisland.tandem.co/index.php?type=key_date&action=details&id=230 230-mercerisland@intand.com 1/24/20 End of First Semester (MIHS) https://mercerisland.tandem.co/index.php?type=key_date&action=details&id=231 231-mercerisland@intand.com 1/27/20 IMS & Elem PD Day (No School: Students) https://mercerisland.tandem.co/index.php?type=key_date&action=details&id=232 232-mercerisland@intand.com 1/27/20 MIHS Grading Day (No School) https://mercerisland.tandem.co/index.php?type=key_date&action=details&id=233 233-mercerisland@intand.com 2/14/20 Valentine's Day https://mercerisland.tandem.co/index.php?type=key_date&action=details&id=186 186-mercerisland@intand.com 2/17/20 - 2/21/20 Mid-Winter Break (No School) https://mercerisland.tandem.co/index.php?type=key_date&action=details&id=234 234-mercerisland@intand.com 2/17/20 President's Day https://mercerisland.tandem.co/index.php?type=key_date&action=details&id=187 187-mercerisland@intand.com 3/8/20 Daylight Saving Time Begins https://mercerisland.tandem.co/index.php?type=key_date&action=details&id=188 188-mercerisland@intand.com 3/17/20 St. Patrick's Day https://mercerisland.tandem.co/index.php?type=key_date&action=details&id=189 189-mercerisland@intand.com 3/19/20 End of Second Trimester (IMS & Elem) https://mercerisland.tandem.co/index.php?type=key_date&action=details&id=235 235-mercerisland@intand.com 3/20/20 IMS & Elem Grading Day (No School) https://mercerisland.tandem.co/index.php?type=key_date&action=details&id=237 237-mercerisland@intand.com 3/20/20 MIHS Prof. Dev Day (No School: Students) https://mercerisland.tandem.co/index.php?type=key_date&action=details&id=236 236-mercerisland@intand.com 3/20/20 - 4/24/20 Statewide public and privates school closures. Effective dates are Tuesday, March 17 through Friday, April 24, subject to extension. https://mercerisland.tandem.co/index.php?type=key_date&action=details&id=246 246-mercerisland@intand.com 4/3/20 End of Third Quarter (MIHS) https://mercerisland.tandem.co/index.php?type=key_date&action=details&id=238 238-mercerisland@intand.com 4/6/20 - 4/10/20 Spring Break (No School) https://mercerisland.tandem.co/index.php?type=key_date&action=details&id=239 239-mercerisland@intand.com 4/12/20 Easter https://mercerisland.tandem.co/index.php?type=key_date&action=details&id=190 190-mercerisland@intand.com 5/5/20 Cinco De Mayo https://mercerisland.tandem.co/index.php?type=key_date&action=details&id=191 191-mercerisland@intand.com 5/22/20 Scheduled Weather Make-up Day https://mercerisland.tandem.co/index.php?type=key_date&action=details&id=240 240-mercerisland@intand.com 5/25/20 Memorial Day https://mercerisland.tandem.co/index.php?type=key_date&action=details&id=192 192-mercerisland@intand.com 6/12/20 Half-day Elementary Grading Day https://mercerisland.tandem.co/index.php?type=key_date&action=details&id=241 241-mercerisland@intand.com 6/19/20 End of Second Semester (MIHS) https://mercerisland.tandem.co/index.php?type=key_date&action=details&id=243 243-mercerisland@intand.com 6/19/20 End of Third Trimester (IMS & Elem) https://mercerisland.tandem.co/index.php?type=key_date&action=details&id=244 244-mercerisland@intand.com 6/19/20 Last Day of School https://mercerisland.tandem.co/index.php?type=key_date&action=details&id=242 242-mercerisland@intand.com 6/22/20 - 6/23/20 Scheduled Weather Make-up Days https://mercerisland.tandem.co/index.php?type=key_date&action=details&id=245 245-mercerisland@intand.com 7/4/20 Independence Day https://mercerisland.tandem.co/index.php?type=key_date&action=details&id=193 193-mercerisland@intand.com