Back To School: Lemont High School 2026-27 School Year Calendar

LEMONT, IL — As July winds to a close, the first day of school for Lemont High School students is just a few weeks away. LHS students will head back to the classroom on Aug. 12, and the 2026-27 school year will wrap up on May 21, 2027.

If you like to plan ahead, here is a look at the important dates this upcoming school year:

• Aug. 11, first day of school for freshmen/transfer students only
• Aug. 12, first day of school for all students
• Sept. 4, early release
• Sept. 7, Labor Day, no school
• Sept. 29, early release at 11:15 a.m.
• Oc.t 7, student testing, no attendance for seniors
• Nov. 3, Election Day, no school
• Nov. 17, early release at 11:15 a.m.
• Nov. 23-27, Thanksgiving break, no school
• Nov. 30, classes resume
• Dec. 17, early release
• Dec. 18, early release, end of first semester, winter break begins
• Jan. 4, teacher institute, no school
• Jan. 5, classes resume
• Jan. 18, Martin Luther King's birthday, no school
• Jan. 26, early release at 11:15 a.m.
• Feb. 12, early release
• Feb. 15, Presidents Day, no school
• March 23, early release at 11:15 a.m.
• March 26, no school
• April 2, early release at 1 p.m., spring break begins
• April 12, classes resume from spring break
• April 13, student testing, no senior attendance
• April 26, teacher institute day, no school
• May 13, last day of school for seniors
• May 14, graduation
• May 20, early release
• May 21, early release, and tentative last day of school for freshmen, sophomores and juniors