Cobb Horizon High SchoolSchool Calendar
2026-27 Academic Calendar
Key dates, holidays, and events for Cobb Horizon High School.
School at a Glance
Upcoming events & academic holidays2026-27 Academic Year
NOV
3
Election Day
NOV
26
Thanksgiving Day
JAN
1
New Year's Day
JAN
18
MLK Day
MAY
17
Early Release Day
MAY
31
Memorial 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 Cobb Horizon 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
December 2, 2026 – December 11, 2026
Georgia Milestones — EOC (Winter)
Testing window
GA
June 21, 2027 – June 24, 2027
Georgia Milestones — EOC (Summer)
Testing window
GA