Sheldon High SchoolSchool Calendar
2026-27 Academic Calendar
Key dates, holidays, and events for Sheldon High School.
School at a Glance
Upcoming events & academic holidays2026-27 Academic Year
NOV
23
No School
No School: Parent-Teacher Conferences & Thanksgiving Break
DEC
21
No School
No School: Winter Break
JAN
4
No School
No School: Winter Break
MAR
22
No School
No School: Spring Break
JUN
16
Half Day: Last Day of School
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 Sheldon 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
August 28, 2026
SAT — National
Registration deadline
September 1, 2026
ACT — National
Late registration deadline
September 1, 2026
SAT — National
Late registration deadline
September 4, 2026
SAT — National
Score release
State Assessments
January 12, 2027 – April 9, 2027
ELPA — Summative
Testing window
OR
February 2, 2027 – June 11, 2027
SBAC — English Language Arts, Mathematics, Science
Testing window
OR