2026-27 Academic Calendar
Key dates, holidays, and events for Plainfield High School.
School at a Glance
Upcoming events & academic holidaysDEC
17
Last Student Day of 1st Semester
DEC
18
½ Teacher Work Day
DEC
21
Christmas Break
JAN
1
Christmas Break
JAN
18
Snow Make-Up Day
FEB
15
President's Day
MAR
26
Spring Break
APR
2
Spring Break
MAY
7
Snow Make-Up Day
Standardized Test Dates
Upcoming national, state, and school calendar dates that affect students at Plainfield High School.
National Tests
August 1, 2026 – November 30, 2026
ISEE — Fall Testing Season
August 3, 2026 – June 30, 2027
SSAT — Flex Testing
October 1, 2026 – October 30, 2026
PSAT 8/9 — Fall
October 1, 2026 – October 30, 2026
PSAT/NMSQT — Fall
October 1, 2026 – October 30, 2026
SAT — School Day - Fall
October 16, 2026
SAT — National
State Assessments
September 14, 2026 – November 13, 2026
ILEARN — Checkpoint One
November 16, 2026 – February 5, 2027
ILEARN — Checkpoint Two
November 30, 2026 – February 19, 2027
ILEARN — Biology ECA Fall/Winter
January 11, 2027 – February 26, 2027
WIDA ACCESS
February 8, 2027 – April 9, 2027
ILEARN — Checkpoint Three
March 29, 2027 – May 7, 2027
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