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MSS Calendar

Important Dates

MSS generally follows the College of San Mateo academic calendar, with a longer thanksgiving holiday and late-winter break.

Our concurrently enrolled students will find additional relevant dates on the CSM website.

  • First Day of School
    August 16, 2023
  • Labor Day
    September 4
  • Columbus Day
    October 11
  • Veterans Day
    November 10
  • Thanksgiving Break
    November 20–24
  • Winter Break
    December 16–January 15, 2024
  • Martin Luther King, Jr. Day
    January 15
  • President’s Week
    February 19–23
  • Spring Break
    March 24–30
  • Last Day of School/Graduation
    May 24
  • Memorial Day
    May 27


Please refer to the College Board site for current dates and information.


Please refer to the ACT site for current dates and information.