⚠Unofficial calendar. Always confirm with your district before making plans. Some dates are estimated from nearby districts or past years — those are marked below.
Naperville CUSD 203
Illinois · 16,073 students · 2026–27 school year
Showing the 2026–27 school year. Past years & forecasts are in our API.
Winter
Dec 21 – Jan 1
Spring
Mar 29 – Apr 2
Last day
May 24
Breaks & no-school days
Day off
Starts
Ends
Institute Day
—
Staff Development Day
—
Teacher Work Day
—
No School-Labor Day Holiday
—
No School-Institute Day
—
No School-Parent/Teacher Conf.
—
No School--Columbus/Indigenous Peoples' Day
—
Winter Break
No School-Institute Day
—
No School-Mlk Holiday
—
No School-Presidents' Day
—
No School-County Institute Day
—
No School-Institute Day
—
No School-Parent/Teacher Conf.
—
Spring Holiday
—
Spring Break
School dayDay offHalf dayEstimated — not yet confirmed by the district