Columbine High SchoolSchool Calendar
2025-26 Academic Calendar
Key dates, holidays, and events for Columbine High School.
School at a Glance
Upcoming events & academic holidays2025-26 Academic Year
MAR
30
No School
Teacher/Staff Development - NO SCHOOL
APR
1
Vitalant Blood Drive
APR
1
End of 2nd Six Week Grading Period
APR
4
Walk For All
APR
14
PSAT 10 / SAT 11 testing
APR
15
PSAT 9 & ASVAB testing
APR
17
Coffee Jam
APR
18
Unified Prom
APR
20
No School
Columbine Day of Service - NO SCHOOL
APR
23
Prom Assembly
APR
24
Prom/After Prom
APR
24
No School
Teacher/Staff Development - NO SCHOOL
APR
29
Stretch for Excellence
APR
30
Day Without Hate
MAY
13
Senior Awards
MAY
14
Graduation Practice
MAY
15
Graduation, Red Rocks
MAY
15
No School
NO SCHOOL
MAY
20
Diploma pickup, Counseling office
MAY
28
LAST DAY End of 2nd Semester Grading Period
MAY
29
***Teacher's Last Day***
Partner TipEarly dismissal days and parent-teacher conferences are often updated 2 weeks in advance. Check back regularly to stay ahead of the schedule!