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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 13, 2025
  • Labor Day
    September 1
  • Columbus Day (observed)
    October 20
  • Veterans Day
    November 11
  • Thanksgiving Break
    November 24–28
  • Winter Break
    December 19–January 11, 2026
  • Martin Luther King, Jr. Day
    January 19
  • Presidents Week
    February 16–20
  • Spring Break
    April 13–17
  • Last Day of School/Graduation
    May 23
  • Memorial Day
    May 25

SAT

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

ACT

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