2026-27 Academic Calendar
Key dates, holidays, and events for Byron Nelson High School.
School at a Glance
Upcoming events & academic holidaysSEP
7
Labor Day Student-Staff Holiday
OCT
8
End of 1st Quarter
OCT
9
Student Holiday/Teacher Flex
OCT
12
Student Holiday/Teacher Planning
DEC
18
End of 2nd Quarter & Early Release
DEC
21
Student-Staff Holiday
JAN
1
Student-Staff Holiday
JAN
4
Student Holiday/Teacher Prof. Learning
JAN
6
Beginning of 3rd Quarter
JAN
18
Student-Staff Holiday
FEB
12
Student-Staff Holiday
FEB
15
Student Holiday/Teacher Planning
MAR
5
Student Holiday/Teacher Prof Learning
MAR
12
End of 3rd Quarter
MAR
15
Spring Break
MAR
22
Student Holiday/Teacher Planning
MAR
23
Beginning of 4th Quarter
MAR
26
Student & Staff Holiday
APR
6
STAAR Testing Dates
Standardized Test Dates
Upcoming national, state, and school calendar dates that affect students at Byron Nelson High School.
National Tests
August 1, 2026 – November 30, 2026
ISEE — Fall Testing Season
August 3, 2026 – June 30, 2027
SSAT — Flex Testing
August 22, 2026
SAT — National
August 28, 2026
SAT — National
September 1, 2026
ACT — National
September 1, 2026
SAT — National
State Assessments
November 30, 2026 – December 11, 2026
STAAR — Fall EOC
February 15, 2027 – March 26, 2027
TELPAS
February 15, 2027 – March 26, 2027
TELPAS Alternate
March 15, 2027 – April 16, 2027
STAAR — Alternate 2
March 15, 2027 – April 16, 2027
STAAR Alternate 2
April 5, 2027 – April 16, 2027
STAAR — Reading Language Arts and English EOC