Mercer Island School District 2020-2021 Calendar https://mercerisland.tandem.co/ Key dates for Mercer Island School District. en-us 8/24/20 - 8/25/20 New Teacher Orientation https://mercerisland.tandem.co/index.php?type=key_date&action=details&id=264 264-mercerisland@intand.com 8/27/20 Tech Integration Day https://mercerisland.tandem.co/index.php?type=key_date&action=details&id=265 265-mercerisland@intand.com 8/28/20 Professional Development Day: Half Day https://mercerisland.tandem.co/index.php?type=key_date&action=details&id=266 266-mercerisland@intand.com 8/31/20 Teacher Prep Day https://mercerisland.tandem.co/index.php?type=key_date&action=details&id=267 267-mercerisland@intand.com 9/1/20 Pre-Service Day https://mercerisland.tandem.co/index.php?type=key_date&action=details&id=268 268-mercerisland@intand.com 9/2/20 First Day of School: 1-12 Grade https://mercerisland.tandem.co/index.php?type=key_date&action=details&id=269 269-mercerisland@intand.com 9/7/20 Labor Day https://mercerisland.tandem.co/index.php?type=key_date&action=details&id=247 247-mercerisland@intand.com 9/8/20 First Day of School: Kindergarten https://mercerisland.tandem.co/index.php?type=key_date&action=details&id=270 270-mercerisland@intand.com 10/9/20 Professional Dev. Day: Half Day (PM) https://mercerisland.tandem.co/index.php?type=key_date&action=details&id=272 272-mercerisland@intand.com 10/9/20 Student Half Day https://mercerisland.tandem.co/index.php?type=key_date&action=details&id=271 271-mercerisland@intand.com 10/12/20 Columbus Day https://mercerisland.tandem.co/index.php?type=key_date&action=details&id=248 248-mercerisland@intand.com 10/31/20 Halloween https://mercerisland.tandem.co/index.php?type=key_date&action=details&id=249 249-mercerisland@intand.com 11/1/20 Daylight Saving Time Ends https://mercerisland.tandem.co/index.php?type=key_date&action=details&id=251 251-mercerisland@intand.com 11/4/20 First Quarter Ends: MIHS https://mercerisland.tandem.co/index.php?type=key_date&action=details&id=273 273-mercerisland@intand.com 11/11/20 Veteran's Day https://mercerisland.tandem.co/index.php?type=key_date&action=details&id=250 250-mercerisland@intand.com 11/16/20 Half-day Elementary Grading Day https://mercerisland.tandem.co/index.php?type=key_date&action=details&id=274 274-mercerisland@intand.com 11/23/20 - 11/25/20 Elementary Conferences (2.5 days) https://mercerisland.tandem.co/index.php?type=key_date&action=details&id=275 275-mercerisland@intand.com 11/23/20 - 11/25/20 No School: Elementary Students https://mercerisland.tandem.co/index.php?type=key_date&action=details&id=276 276-mercerisland@intand.com 11/25/20 End of First Trimester (IMS & Elem) https://mercerisland.tandem.co/index.php?type=key_date&action=details&id=277 277-mercerisland@intand.com 11/25/20 IMS/MIHS Student Half-day https://mercerisland.tandem.co/index.php?type=key_date&action=details&id=278 278-mercerisland@intand.com 11/25/20 MIHS Regular Start https://mercerisland.tandem.co/index.php?type=key_date&action=details&id=279 279-mercerisland@intand.com 11/25/20 Progress Report Prep (IMS) https://mercerisland.tandem.co/index.php?type=key_date&action=details&id=280 280-mercerisland@intand.com 11/26/20 Thanksgiving https://mercerisland.tandem.co/index.php?type=key_date&action=details&id=252 252-mercerisland@intand.com 11/26/20 - 11/27/20 Thanksgiving Break (No School) https://mercerisland.tandem.co/index.php?type=key_date&action=details&id=281 281-mercerisland@intand.com 12/21/20 - 1/1/21 Winter Break (No School) https://mercerisland.tandem.co/index.php?type=key_date&action=details&id=282 282-mercerisland@intand.com 12/25/20 Christmas Day https://mercerisland.tandem.co/index.php?type=key_date&action=details&id=253 253-mercerisland@intand.com 1/1/21 New Year's Day https://mercerisland.tandem.co/index.php?type=key_date&action=details&id=254 254-mercerisland@intand.com 1/4/21 School Resumes https://mercerisland.tandem.co/index.php?type=key_date&action=details&id=283 283-mercerisland@intand.com 1/18/21 Martin Luther King Day https://mercerisland.tandem.co/index.php?type=key_date&action=details&id=255 255-mercerisland@intand.com 1/19/21 - 1/22/21 Finals Week: MIHS https://mercerisland.tandem.co/index.php?type=key_date&action=details&id=284 284-mercerisland@intand.com 1/22/21 Second Quarter Ends: MIHS https://mercerisland.tandem.co/index.php?type=key_date&action=details&id=285 285-mercerisland@intand.com 1/25/21 IMS & Elem PD Day (No School: Students) https://mercerisland.tandem.co/index.php?type=key_date&action=details&id=286 286-mercerisland@intand.com 1/25/21 MIHS Grading Day (No School) https://mercerisland.tandem.co/index.php?type=key_date&action=details&id=287 287-mercerisland@intand.com 2/14/21 Valentine's Day https://mercerisland.tandem.co/index.php?type=key_date&action=details&id=256 256-mercerisland@intand.com 2/15/21 - 2/19/21 Mid-Winter Break (No School) https://mercerisland.tandem.co/index.php?type=key_date&action=details&id=288 288-mercerisland@intand.com 2/15/21 President's Day https://mercerisland.tandem.co/index.php?type=key_date&action=details&id=257 257-mercerisland@intand.com 3/14/21 Daylight Saving Time Begins https://mercerisland.tandem.co/index.php?type=key_date&action=details&id=258 258-mercerisland@intand.com 3/17/21 St. Patrick's Day https://mercerisland.tandem.co/index.php?type=key_date&action=details&id=259 259-mercerisland@intand.com 3/18/21 Second Trimester Ends (IMS/Elementary) https://mercerisland.tandem.co/index.php?type=key_date&action=details&id=289 289-mercerisland@intand.com 3/19/21 IMS & Elem Grading Day (No School) https://mercerisland.tandem.co/index.php?type=key_date&action=details&id=291 291-mercerisland@intand.com 3/19/21 MIHS Prof. Dev Day (No School: Students) https://mercerisland.tandem.co/index.php?type=key_date&action=details&id=290 290-mercerisland@intand.com 4/4/21 Easter https://mercerisland.tandem.co/index.php?type=key_date&action=details&id=260 260-mercerisland@intand.com 4/5/21 - 4/9/21 Spring Break (No School) https://mercerisland.tandem.co/index.php?type=key_date&action=details&id=292 292-mercerisland@intand.com 4/14/21 Third Quarter Ends: MIHS https://mercerisland.tandem.co/index.php?type=key_date&action=details&id=293 293-mercerisland@intand.com 5/5/21 Cinco De Mayo https://mercerisland.tandem.co/index.php?type=key_date&action=details&id=261 261-mercerisland@intand.com 5/31/21 Memorial Day https://mercerisland.tandem.co/index.php?type=key_date&action=details&id=262 262-mercerisland@intand.com 6/11/21 Half-day Elementary: Grading Day https://mercerisland.tandem.co/index.php?type=key_date&action=details&id=294 294-mercerisland@intand.com 6/18/21 Last Day of School https://mercerisland.tandem.co/index.php?type=key_date&action=details&id=295 295-mercerisland@intand.com 6/21/21 - 6/23/21 Scheduled Weather Make-up Days https://mercerisland.tandem.co/index.php?type=key_date&action=details&id=296 296-mercerisland@intand.com 7/4/21 Independence Day https://mercerisland.tandem.co/index.php?type=key_date&action=details&id=263 263-mercerisland@intand.com