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
AUG
17
First Day of School
SEP
7
Labor Day
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)
Partner 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 7, 2026
SAT — National
Registration deadline
August 11, 2026
SAT — National
Late registration deadline
August 14, 2026
ACT — National
Registration deadline
August 22, 2026
SAT — National
Test date
August 28, 2026
SAT — National
Registration deadline
September 1, 2026
ACT — National
Late registration deadline
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