Calendar
Additional Calendars
- Bell Times Schedule - (school start and dismissal times)
- Religious and Public Holiday Calendar
- Staff Recognition Calendar
- 2025-26 School Calendar (Updated 4/22/26)
- 2026-27 School Calendar
- 2027-28 School Calendar*(Updated 2/23/26)
(All Mount Si High School athletic calendars are available at: www.kingcoathletics.com)
Mount Si High School Calendar
Sunday
Monday
Tuesday
Wednesday
Thursday
Friday
Saturday
Sunday, May 31
Monday, June 1
Wednesday, June 3
Thursday, June 4
Friday, June 5
Saturday, June 6
Sunday, June 7
Monday, June 8
Tuesday, June 9
Wednesday, June 10
Thursday, June 11
Friday, June 12
Saturday, June 13
Sunday, June 14
Monday, June 15
Tuesday, June 16
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Snoqualmie Valley School District
Last Day of Classes K-12 Students (Half-Day Schedule)
All Day
Wednesday, June 17
Thursday, June 18
Friday, June 19
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Snoqualmie Valley School District
Juneteenth Holiday (District closed)
All Day
Saturday, June 20
Sunday, June 21
Monday, June 22
Tuesday, June 23
Wednesday, June 24
Thursday, June 25
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Snoqualmie Valley School District
Board of Directors Meeting
MSHS Library
Friday, June 26
Saturday, June 27
Sunday, June 28
Monday, June 29
Tuesday, June 30
Wednesday, July 1
Thursday, July 2
Friday, July 3
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Snoqualmie Valley School District
July 4th Holiday Observed (District closed)
Saturday, July 4
Calendar & Category Legend:
- Mount Si High Mount Si High
- Snoqualmie Valley School District Snoqualmie Valley School District