Preschool through Grade 12

School Calendar

Download our School Year Calendars, and view upcoming events below.

School Year 2019-2020: 

    

School Year 2020-2021:

  • First Day of School: Wednesday, September 2nd, 2020
  • October break: October 19th through 23rd, 2020
  • End-of-Year Break: December 18th, 2020 through January 1st, 2021
  • Winter Break: February 15th through 19th, 2021
  • Spring Break: April 19th through 23rd, 2021
  • Last Day of School: Wednesday, June 16th, 2021
Sunday Monday Tuesday Wednesday Thursday Friday Saturday
Sun, Dec 29
Mon, Dec 30
Wed, Jan 1
Thu, Jan 2
Fri, Jan 3
Sat, Jan 4
Sun, Jan 5
Mon, Jan 6
Classes Resume
Tue, Jan 7
Wed, Jan 8
Thu, Jan 9
Coffee cup2 Coffee Morning: MS
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Cafeteria
Tenerife Trip Meeting
Media Center
Fri, Jan 10
ERB Testing: Grades 3-5
-
Classrooms & Cafeteria
Secondary Concert
-
Media Center
Sat, Jan 11
Sun, Jan 12
Mon, Jan 13
ERB Testing: Grades 3-5
Classrooms & Cafeteria
MUN Scrimmage
-
Media Center & Student Lounge
Tue, Jan 14
ERB Testing Concludes: Grades 3-5
Classrooms & Cafeteria
Canadian Universities Presentations & Mini-fair
-
Media Center
Wed, Jan 15
Info Session: 9FR Parents "Brevet"
Media Center
Thu, Jan 16
Fri, Jan 17
PTO Meeting
-
Cafeteria
Sat, Jan 18
Sun, Jan 19
PTO Ice Skating Night
-
Kendall Square
Mon, Jan 20
Morning of Service
-
Cambridge cafeteria
Wed, Jan 22
ERB Testing Begins: Grades 6-8
-
Classrooms and Media Center
Field Trip: KA,KB & KC
-
ICA Boston, MA
Thu, Jan 23
Subscribe to Alerts ERB Testing: Grades 6-8
-
Classrooms and Media Center
Subscribe to Alerts Field Trip: Grade 3
-
Lexington Symphony Orchestra
Subscribe to Alerts Field Trip: 10 FR
-
Cambridge, MA
Fri, Jan 24
Subscribe to Alerts ERB Testing: Grades 6-8
-
Classrooms and Media Center
Sat, Jan 25
Subscribe to Alerts School icon Preschool & Kindergarten Open House: Register Here
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International School of Boston, 45 Matignon Road, Cambridge, MA 02140
Sun, Jan 26
Mon, Jan 27
Tue, Jan 28
Wed, Jan 29
Thu, Jan 30
Fri, Jan 31
Sat, Feb 1

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