Wellesley Sr HighSchool Calendar
2026-27 Academic Calendar
Key dates, holidays, and events for Wellesley Sr High.
School at a Glance
Upcoming events & academic holidays2026-27 Academic Year
AUG
26
New Professional Staff
AUG
31
All Professional Staff
OCT
12
No School
Indigenous Peoples Day – Schools & Offices Closed
NOV
5
Early Release PreK-5 Parent Conferences
NOV
11
No School
Veterans Day – Schools & Offices Closed
NOV
25
Early Release – Schools
NOV
26
No School
Thanksgiving Recess – Schools Closed
NOV
30
No School
Professional Day – Schools Closed
DEC
24
No School
December Break – Schools Closed
JAN
4
School Reopens
JAN
18
No School
Martin Luther King Jr. Day – Schools & Offices Closed
FEB
15
No School
February Break – Schools Closed
MAR
10
No School
Eid al-Fitr – Schools Closed
MAR
26
No School
Good Friday – Schools Closed
APR
6
Early Release PreK-5 Parent Conferences
APR
19
No School
April Break – Schools Closed
MAY
31
No School
Memorial Day – Schools & Offices Closed
JUN
3
WHS Seniors Last Day of School
JUN
11
WHS Graduation / Half Day WHS Only
JUN
18
No School
Juneteenth – Schools & Offices Closed
JUN
28
Last Day STUDENTS (assumes 5 contingency days)
JUN
29
Last Day TEACHERS (assumes 5 contingency days)
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 Wellesley Sr 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
March 23, 2027 – March 24, 2027
MCAS — ELA
Testing window
MA
May 18, 2027 – May 20, 2027
MCAS — Mathematics
Testing window
MA
June 1, 2027 – June 2, 2027
MCAS — Science and Technology/Engineering
Testing window
MA