Are Montessori Schools Open Year-Round? How to Plan for Summer and School Breaks

Some are. Each Montessori school sets its own calendar, so one may stay open 12 months with a few holiday closures while another follows a school year and runs summer sessions you sign up for separately. Ask for the calendar for the year you would enroll, then count the workdays it leaves uncovered.

What Is the Difference Between a School-Year and a 12-Month Program?

A school-year program looks like a public school calendar, with a long summer break and shorter breaks in winter and spring. Public Montessori programs follow their district’s or charter’s calendar. In 2023, 28 states and DC set 180 days as the minimum school year for public schools, and the rest set a different number of days or counted hours (NCES, Table 234.20). A school that charges tuition picks its own dates.

A 12-month program keeps classes or care running through the summer and closes only for holidays and a few training days. Tuition may be spread over 12 months, but that doesn’t always mean summer is included, so ask what the monthly payment buys.

Summer sessions sit in between. At some schools they extend the year for children enrolled for the school year. Elsewhere they run like a day camp that takes children from outside the school, sold in blocks of a week or two.

Watch the word itself, too. In public education, “year-round” can describe a balanced calendar, with roughly the same number of school days spread across the year, a shorter summer and breaks of two or three weeks every few months. A public Montessori program on that kind of calendar leaves you about as many days to cover as a traditional one. They just arrive in smaller pieces, several times a year, and each one needs its own plan.

How Many Weeks Will I Still Need to Cover?

There are about 260 weekdays in a year. A 180-day calendar leaves about 80 of them without class, roughly 16 weeks, before you take off the holidays your employer closes for.

Your own leave covers part of that gap. In March 2026, US private-industry workers averaged 11 paid vacation days after one year with their employer, and 16 days after five years (BLS).

What Does That Look Like on a School Calendar?

The calendar below is made up for illustration and isn’t any school’s real schedule. It assumes both parents’ workplaces close on July 4, Thanksgiving Day, Christmas Day and New Year’s Day, and stay open on Monday holidays and the Friday after Thanksgiving.

Closure	Weekdays without class	Workdays to cover
Summer break, 12 weeks	60	59
Summer sessions you sign up for, 6 weeks		minus 30
Winter break, 2 weeks	10	8
Spring break, 1 week	5	5
Thanksgiving, Wednesday to Friday	3	2
Four Monday holidays	4	4
Staff training and conference days	6	6
Total	88	54

That is 54 workdays, about 11 weeks, with the summer sessions already counted. If each parent has 11 vacation days and they take them on different dates, they can cover 22 of those days. That leaves 32 days for camps, relatives or backup care, and it uses every vacation day both parents have, with none kept for a family trip or a sick child.

In this calendar the first summer session starts a week after the last day of class, and the last one ends five weeks before school returns. Those six weeks around the sessions are where most of the uncovered days sit.

What Should I Know About Summer Sessions?

Start by asking who can enroll. Some schools keep summer for children enrolled for the school year, and others open it to anyone in the age range, which can fill the places early.

Sign-up for summer may open months ahead, with its own deposit, and popular weeks can fill before the school year ends. Ask whether the summer day keeps the usual hours and before and after care, and whether your child’s teacher works in summer or a different team runs it. A younger child who spends a week with new adults in a new room may need a few days to settle, which is worth knowing before you book a single week.

Day camp can count as a work-related expense for the child and dependent care credit, but overnight camp doesn’t (IRS Publication 503, 2025). Our cost guide shows how to add summer and closure days to a yearly budget.

What Should I Ask Before I Sign?

• Can I have the calendar for the year we would enroll, with training and conference days marked?
• Does tuition cover 10 months or 12, and are any summer weeks included?
• When are the summer sessions, how are they sold, and when does sign-up open?
• Is before and after care open on closure days and during summer?
• Is there a week before school starts when everything is closed?
• Do early dismissal days appear on the calendar, or are they announced during the year?

Our school pages show weekday hours from Google, not school calendars, so open each school’s website from its page in our directory or call the office. If both parents work full time, read this alongside Can Montessori School Work When Both Parents Work Full Time?, which tests the daily schedule.