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Calendar

Jefferson County Open School Calendar

View the Bell Schedule

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April 2026
Monday Tuesday Wednesday Thursday Friday Sat/Sun
Monday, March 30
NO SCHOOL *for students (*potential snow make up day)
All Day
NO SCHOOL *for students (*potential snow make up day)
All Day
Tuesday, March 31
Chipotle Mexican Grill: Malama Hawaii Fundraiser
-
355 S WADSWORTH BLVD, LAKEWOOD, CO, 80226
Wednesday, April 1
Grow It, Make It, Give It Class Trip-Hannah, Jenny T
-
Jenny Tanner's Advising - Wacky Wednesday Activity
-
Bridges / 6th Grade Field Trip
-
Thursday, April 2
Advanced Ceramics Class Field Trip: Kelly
-
Skylines and Hemlines Field Trip: KT
-
Jen W's Advising Group + Family Group Activity
-
Kindergarten playdate with HS Buddies (off campus)
-
Friday, April 3
Snow Mechanics Class Activity Trip - Dan
-
Math Lab Class Field Trip: Tony, Milo +
-
FOUNDATIONS FRIDAY ACTIVITIES
-
Saturday, April 4
Sunday, April 5
Monday, April 6
Grow It, Make It, Give It Class Trip-Hannah, Jenny T
-
Tuesday, April 7
CMAS Math Testing 3rd-8th Grades
All Day
CMAS Math Testing 3rd-8th Grades
All Day
Kelly's Advising Group Neighborhood Walks
-
PTSO (last meeting of the school year)
-
Wednesday, April 8
CMAS Math Testing 3rd-8th Grades
All Day
Grow It, Make It, Give It Class Trip-Hannah, Jenny T
-
Jenny Tanner's Advising - Wacky Wednesday Activity
-
Boundary Waters Trip Parent Meeting
-
JCOS Library
Thursday, April 9
CMAS Math Testing 3rd-8th Grades
All Day
Friday, April 10
HS Passage Day
All Day
HS Passage Day
All Day
National Treasurers Class Field Trip: KT PW
-
HS Passage Day
-
Snow Mechanics Class Activity Trip - Dan
-
FOUNDATIONS FRIDAY ACTIVITIES
-
Saturday, April 11
Sunday, April 12
Monday, April 13
HS Passage Day
All Day
HS Passage Day
All Day
HS Passage Day
-
3rd Grade Mandatory Overnight Trip Meeting
-
Tuesday, April 14
CMAS ELA Testing 3rd-8th Grades
All Day
CMAS ELA Testing 3rd-8th Grades
All Day
SAT
-
Wednesday, April 15
CMAS ELA Testing 3rd-8th Grades
All Day
PSAT 9
-
PSAT 10
-
Thursday, April 16
CMAS ELA Testing 3rd-8th Grades
All Day
CMAS 11th Grade Science Testing
-
Day of Celebration (fka Night of Exhibition and Elem Museum Night)
-
Anatomy and Physiology Class: Blood Drive (Jenny T)
-
Friday, April 17
CMAS 8th Grade Science Testing
All Day
CMAS 8th Grade Science Testing
All Day
Boundary Waters Class Canoe Practice Day
-
6th and 7th grade Field Trip
-
FOUNDATIONS FRIDAY ACTIVITIES
-
Saturday, April 18
Sunday, April 19
Monday, April 20
Grow It, Make It, Give It Class Trip-Hannah, Jenny T
-
Men's Class Excursion Prep Field Trip: Andrew
-
Tuesday, April 21
IA Spring Trip: Meds Drop Off - Ally, Amy
-
JCOS Conference Room
Girls Hike Day: Adria, Nora
-
Kelly's Advising Group Neighborhood Walks
-
Community Advisory Circle (last meeting of the school year)
-
Library
Wednesday, April 22
Grow It, Make It, Give It Class Trip-Hannah, Jenny T
-
Adventures in Art Class Field Trip: Jenny L, Kara +
-
Jenny Tanner's Advising - Wacky Wednesday Activity
-
Let's Talk About It Class Field Trip - Jenny T, John
-
Pre-Trip Picnic Field Trip-Haley's Advising Group
-
Men's Class Excursion: Andrew
-
Thursday, April 23
HS PROM time TBD
All Day
HS PROM time TBD
All Day
Global Awareness Passage Field Trip: Dianne+
-
Friday, April 24
NO SCHOOL *for students (*potential snow make up day)
All Day
NO SCHOOL *for students (*potential snow make up day)
All Day
Saturday, April 25
Sunday, April 26
Monday, April 27
IA Spring Trip: 04/27-29/26
All Day
IA Spring Trip: 04/27-29/26
All Day
Boundary Waters: Meds Drop Off - Ally, Amy
-
JCOS Conference Room
Pine Ridge Service Trip: Meds Drop Off - Ally, Amy
-
JCOS Conference Room
Grow It, Make It, Give It Class Trip-Hannah, Jenny T
-
Tuesday, April 28
IA Spring Trip: 04/27-29/26
All Day
Charm City, Baltimore, MD Trip: Meds Drop Off - Ally, Amy
-
JCOS Conference Room
Pine Ridge Spring Service Trip Meds Drop Off - Ally, Amy
-
Tony's Advising Overnight Meds Drop Off - Amy, Ally
-
JCOS Conference Room
Kelly's Advising Group Neighborhood Walks
-
Wednesday, April 29
IA Spring Trip: 04/27-29/26
All Day
Malama Hawaii Trip: Meds Drop Off - Ally, Amy
-
JCOS Conference Room
Grow It, Make It, Give It Class Trip-Hannah, Jenny T
-
DCPA Matinee Field Trip: Jenny L, Tommy (+ select students)
-
Jenny Tanner's Advising - Wacky Wednesday Activity
-
Backcountry Kitchen Trip Parent Meeting
-
Kara's Room N201
Charm City Trip Group Parent/Guardian Meeting
-
JCOS-Jenny Long's Room C104
TENTATIVE - Pine Ridge Spring Service Trip Parent Meeting
-
Tony's Room B201
Thursday, April 30
Andrew's Advising Group Day Outing
-
Al's Advising Group Activity Day
-
Scott's Advising Group Activity Day
-
Adria's Advising Group Activity Day
-
Jenny L's Advising Group Day Trip
-
TASTE of JCOS: Spring Fundraiser
-
Jefferson County Open School, 7655 W 10th Ave, Lakewood, CO 80214
Friday, May 1
Boundary Waters Trip 05/01-05/17 JW MO KC JT AC
All Day
Boundary Waters Trip 05/01-05/17 JW MO KC JT AC
All Day
HS Passage Day
All Day
HS Passage Day
All Day
Field Day
-
Saturday, May 2
Boundary Waters Trip 05/01-05/17 JW MO KC JT AC
All Day
Sunday, May 3
Boundary Waters Trip 05/01-05/17 JW MO KC JT AC
All Day
Boundary Waters Trip 05/01-05/17 JW MO KC JT AC
All Day

Each school year calendar has a set number of teacher work days and days that require teacher and student contact according to state law (CRS 22-32-109 (n)) and District Policy IC - ICA.

Individual school calendars show more events and additional Modified Contact Days.

District 2025-26 School Year Calendars

Family Calendar (English) Calendario para el Año Escolar (Spanish) Lịch Cho Các Gia Đình Của Học Khu 2025-26 (Vietnamese) Окружной Календарь Для Семей (Russian)

Student Assessment Schedules