Yankton High School - 01School Calendar
2026-27 Academic Calendar
Key dates, holidays, and events for Yankton High School - 01.
School at a Glance
Upcoming events & academic holidays2026-27 Academic Year
OCT
12
No School
Native American Day - No School
OCT
16
End of First Quarter
OCT
23
No School
Teacher In-Service - No School for Students
NOV
11
No School
Veteran's Day - No School
NOV
25
No School
Conference Compensation Day - No School
NOV
26
No School
Thanksgiving Vacation - No School
NOV
27
No School
Thanksgiving Vacation - No School
DEC
18
End of Second Quarter - 1:00 PM Early Dismissal
DEC
21
No School
Christmas Vacation No School
JAN
4
School Resumes
JAN
18
No School
Martin Luther King Day - No School
FEB
5
No School
Teacher In-Service - No School for Students
FEB
15
No School
President's Day - No School
MAR
5
End of Third Quarter
MAR
25
No School
Conference Compensation Day - No School
MAR
26
No School
Easter Vacation - No School
MAR
29
No School
Easter Vacation - No School
APR
16
No School
Teacher In-Service - No School
MAY
12
Baccalaureate - sponsored by the Yankton Ministerial Association
MAY
16
Graduation
MAY
18
Last day of School [Tentative] - 1:00 PM Early Dismissal
MAY
19
Teacher Workdays
MAY
20
Teacher In-Service
MAY
21
Teacher Workdays
MAY
31
No School
Memorial Day - Office Closed
JUN
18
No School
Juneteenth Observed - Offices Closed
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 Yankton High School - 01.
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
September 22, 2026
SAT — National
Late registration deadline
September 25, 2026
SAT — National
Score release
September 29, 2026
ACT — National
Late registration deadline
October 1, 2026 – October 30, 2026
PSAT 8/9 — Fall
Testing window
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