2026-27 Academic Calendar
Key dates, holidays, and events for Lyons Middle/Senior High School.
School at a Glance
Upcoming events & academic holidaysOCT
19
Non-Student Contact Day
NOV
23
Thanksgiving Break
DEC
21
Winter Break
JAN
4
Non-Student Contact Day, Split Day
JAN
18
Martin Luther King Jr. Day
FEB
12
Non-Student Contact Day
FEB
15
Presidents' Day
MAR
15
Spring Break
APR
26
Non-Student Contact Day
APR
27
Non-Student Contact Day
MAY
26
Life Skills ACE Completion
MAY
27
Graduation - LaunchED Virtual Academy
MAY
27
Last Day of School for Students
MAY
28
Graduation - New Meridian HS, St. Vrain Virtual HS, and Universal HS
MAY
29
Graduation - Erie HS, Frederick HS, Longmont HS, Lyons HS, Mead HS
MAY
29
Graduation - Niwot HS, Silver Creek HS, and Skyline HS
MAY
31
Memorial Day
Standardized Test Dates
Upcoming national, state, and school calendar dates that affect students at Lyons Middle/Senior 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 17, 2026
ACT — National
State Assessments
January 11, 2027 – February 12, 2027
WIDA ACCESS
January 11, 2027 – February 12, 2027
WIDA Alternate ACCESS
April 5, 2027 – April 23, 2027
CMAS
April 5, 2027 – April 23, 2027
CoAlt