Chester High School - 01School Calendar
2026-27 Academic Calendar
Key dates, holidays, and events for Chester High School - 01.
School at a Glance
Upcoming events & academic holidays2026-27 Academic Year
OCT
8
1:30 dismissal (Conferences 2-8)
OCT
9
No School
No school (Native American Day)
DEC
23
No School
No school (Christmas)
JAN
4
No School
No school (Christmas)
JAN
18
No School
No school (Martin Luther King Day)
FEB
12
No School
No school (Presidents Day)
MAR
17
No School
No school (Spring Break)
MAR
26
No School
No school (Easter)
MAY
7
10:25 start (Teacher Inservice)
MAY
15
2:00 pm Graduation
MAY
19
Last Day of School (12:30 dismissal)
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 Chester High School - 01.
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 25, 2027 – February 26, 2027
SD English Language Proficiency Assessment (ACCESS 2.0)
Testing window
SD
March 9, 2027 – April 16, 2027
SD-ACT
Testing window
SD