Delta High SchoolSchool Calendar
2025-26 Academic Calendar
Key dates, holidays, and events for Delta High School.
School at a Glance
Upcoming events & academic holidays2025-26 Academic Year
SEP
28
No School
Parent/Teacher Conferences - No School for K-5
OCT
12
Fall Break
NOV
2
Teacher Inservice
NOV
23
Thanksgiving Break
DEC
21
Christmas Break
JAN
4
Teacher Inservice
JAN
18
MLK Jr. Day
FEB
1
No School
Parent/Teacher Conferences - No School for K-5
FEB
15
Winter Break
MAR
8
Teacher Inservice
APR
12
Spring Break
MAY
28
Last Day of School (1/2 day)
Calendar TipEarly dismissal days and parent-teacher conferences are often updated 2 weeks in advance. Check back regularly to stay ahead of the schedule!
Standardized Test Dates
Upcoming national, state, and school calendar dates that affect students at Delta High School.
National Tests
August 1, 2026 – November 30, 2026
ISEE — Fall Testing Season
Testing window
August 3, 2026 – June 30, 2027
SSAT — Flex Testing
Testing window
September 22, 2026
SAT — National
Late registration deadline
September 25, 2026
SAT — National
Score release
September 29, 2026
ACT — National
Late registration deadline
October 1, 2026 – October 30, 2026
PSAT 8/9 — Fall
Testing window
State Assessments
January 11, 2027 – February 12, 2027
WIDA ACCESS
Testing window
CO
January 11, 2027 – February 12, 2027
WIDA Alternate ACCESS
Testing window
CO
April 5, 2027 – April 23, 2027
CMAS
Testing window
CO
April 5, 2027 – April 23, 2027
CoAlt
Testing window
CO