Seneca HighSchool Calendar
2025-26 Academic Calendar
Key dates, holidays, and events for Seneca High.
School at a Glance
Upcoming events & academic holidays2025-26 Academic Year
AUG
4
First Day for Students
SEP
7
Labor Day Holiday
SEP
29
Parent Teacher Conferences
SEP
30
Parent Teacher Conferences
OCT
2
Last Day of Quarter 1
OCT
5
Fall Break Begins
OCT
12
Staff Development Exchange Day (IN #7)
OCT
13
Quarter 2 Begins
NOV
2
School Holiday
NOV
3
School Holiday
NOV
25
Thanksgiving Holiday Begins
DEC
17
High School Exams
DEC
18
Half-Day/ High School Exams
DEC
18
Last Day of Quarter 2 & Semester 1
DEC
21
Christmas Break begins for students
JAN
4
Teacher In-Service #8
JAN
5
Quarter 3 & Semester 2 Begin
JAN
18
Martin Luther King Day
FEB
15
Teacher In-Service #9
MAR
12
Last Day of Quarter 3
MAR
15
Spring Break begins
MAR
22
Quarter 4 Begins
APR
19
Teacher In-Service #10
MAY
25
Senior Exams
MAY
26
Senior Exams
MAY
27
Half-day/ Underclass Exams
MAY
28
Half-day/ Underclass Exams
MAY
28
Last Day of Quarter 4 & Semester 2
MAY
28
Graduation
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 Seneca High.
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
September 1, 2026 – October 15, 2026
KRA
Testing window
SC
November 30, 2026 – January 22, 2027
EOCEP
Testing window
SC
January 25, 2027 – March 19, 2027
KRA
Testing window
SC