100th Day of School 2027: How to Find Your Date and Order in Time

Every January, the same question shows up in teacher group chats: "Wait, when is our 100th day?" There is no single national date. Each school reaches day 100 on its own calendar, and one ice day or a schedule change can move it. This guide shows you how to find your exact 100th day of school in 2027, when to order shirts so they arrive in time, and which designs work for teachers, grade teams and parent volunteers.

When is the 100th day of school in 2027?

It depends on your district calendar. The 100th day is the 100th instructional day, counted from the first day of school. Weekends, holidays, teacher workdays, staff development days and breaks do not count. Days when students attend do count, including early-release days in most districts.

School years are not the same length everywhere. Pew Research Center found that of the 38 states that set a minimum number of school days, 27 require 180. Texas works differently: it sets a minimum of 75,600 minutes per year, recess and intermissions included, instead of a day count, and districts spread those minutes across their own calendars. That is why two schools in the same county can hit day 100 a week apart.

How to calculate your 100th day

1. Pull up the 2026-2027 school calendar your district published, the one that marks student holidays and staff days.
2. Start at the first day of school as day 1. Count only the days students are in class.
3. Skip Labor Day, fall break, Thanksgiving week, winter break, MLK Day and every student holiday or staff workday on the calendar.
4. Stop when you reach 100. Write the date on the team calendar.
5. Ask the front office if the school already tracks it. Some campuses count the days on the morning announcements, and the attendance office can confirm the number.

A shortcut that works on most calendars: count how many student days fall before winter break, subtract that number from 100, and count that many days into January.

What month is usually the 100th day of school?

For a school that starts in mid-August, day 100 tends to land in late January or early February. A school that starts after Labor Day usually gets there later in February. In a 180-day year, the 100th day comes a little past the halfway point, which is why it so often falls right after winter break. Your own calendar is the only real answer, so count it once and share it with your grade team.

Bad weather and make-up days

If your campus closes for ice, snow or a power outage before the 100th day, the count moves back one day for every day missed. Some districts add make-up days later in the year instead, so the 100th day stays where it was. Decide as a team whether you will celebrate on the counted day or on the date already printed on the class newsletter. The simplest choice is usually the newsletter date, since a one-day difference rarely matters to a class of seven-year-olds.

When to order 100th day shirts

Every shirt is printed after it is ordered. Orders ship in 1 to 3 business days. Most orders arrive 3 to 5 business days after shipping. For an event date like the 100th day, count back about eight business days and order on or before that day. Here is what that looks like on three common dates:

If your 100th day falls in the third or fourth week of January, the order window lands during winter break. Order before you leave for break so the shirts are waiting when you come back. Shipping is $9 on orders under $49, and Economy shipping is free on orders of $49 or more, so two S to XL tees ($59.98) qualify. Carrier rates from UPS and USPS can also show at checkout, and the checkout total is final. Details are on our shipping information page.

Teacher shirts for the 100th day

Teachers usually want a design that reads clearly from across the room and still feels fine to wear on a normal Friday later. These four are written from the teacher's side of the desk.

• 100 Days Of Coffee Teach Repeat: script lettering next to a coffee cup with a heart on it, with small pink stars around it. Good for the teacher who has counted every one of those days in cups.
• My Students 100 Days Smarter: a big dotted "100" in rainbow colors between "My Students" and "Smarter". The message is about the class, not you, so it doubles as a nice photo for the class newsletter.
• 100 Days Making A Difference: bold red and blue block letters over a pencil. A simple, steady pick for counselors, aides and specialists too.
• 100 Days Of Teaching The Brightest Crayons: warm brown and orange lettering with two little alarm clocks. Fits a primary classroom with a crayon or art theme.

Grade-level picks for the whole team

A grade team does not need identical shirts to look like a team in the class photo. Pick one design for the grade or one garment color for everyone. These designs name the grade, which makes the photo easy to caption later.

• 100th Day Of Pre-K: dotted rainbow letters, a small flower and a pencil underneath.
• 100 Days Of Kindergarten Rainbow: a rainbow theme for a kindergarten hallway.
• Happy 100th Day Of 1st Grade: for a first grade team that wants the grade on the front.
• Happy 100 Days Of School Confetti: yellow, coral and teal lettering with alarm clocks, pencils and scissors around it. Works for any grade, the office and the specials team.
• I Survived 100 Days Of School: the honest one, with a bubbly "100" and little hearts. Save it for the staff who will laugh.

Every design comes in 15 garment colors, from Ivory, Blossom and Chambray to Moss, Pepper and Black. Light colors like Ivory and Blossom make bright artwork pop. Have one person collect each teacher's size and color in a shared sheet and place one order, which keeps shipping simple and gets the whole team past the $49 line.

Missed the day? There is a shirt for that

If the 100th day sneaks up on you, or an ice day pushes the party, 101 Days Of School turns the late celebration into the joke. It has a pink and white rainbow with a heart in the middle and "101 Days Of School" underneath.

Classroom ideas that pair with the shirt

The shirt is the easy part. The 100th day is really a math and literacy day, and most teachers build it around the number 100:

• Collections of 100. Each student brings 100 small things in a zip bag, and the class sorts them into groups of ten. It is a quick place value lesson that kids remember.
• 100 movement breaks. 100 jumping jacks, 100 steps down the hallway or 100 claps, counted by tens or fives.
• Writing prompts. "If I had 100 dollars," "I am 100 days smarter because," or "When I am 100 years old" for a first or second grade class.
• Word problems. Third and fourth grade classes can solve problems that land on 100, then write their own for a partner.
• Bulletin boards. A hallway board of 100 student-drawn stars or handprints is a simple craft that fills a wall.

Middle and high school classes rarely mark the day, but some advisory periods do a quick 100-day reflection or goal check. That is a nice moment for a teacher shirt even if the kids do not dress up.

For parents and room parents

Our graphic tees are made in adult unisex sizes S to 3XL only, so they are for teachers, staff and the grown-ups who help with the party, not for students. If you are a room parent running the 100th day station, a matching shirt with the teacher makes you easy to spot in a busy classroom. For sizing, lay a shirt you already like flat, measure across the chest about an inch below the armholes, and compare it with our size and measurement guide. More planning help is in our 100 Days of School shirt guide.

Ordering for 12 or more people, like a whole campus? Send a bulk order request with the design, colors, sizes and your date. The timeline is confirmed with the quote. Schools can also start from our school orders page.

Quick answers

When is the 100th day of school in 2027?

There is no national date. Count 100 student days from your first day of school on the 2026-2027 district calendar. For many August-start schools that lands in late January or early February.

How do schools calculate the 100th day?

They count instructional days only, starting with the first day as day 1 and skipping weekends, holidays, breaks and staff days.

What happens if school closes for weather before day 100?

The count moves back a day for each closed day, unless your district adds make-up days later in the year. Check with the front office.

Do you have kids sizes?

No. These tees come in adult unisex sizes S to 3XL. Prices are $29.99 for S to XL, $32.99 for 2XL and $34.99 for 3XL.

How should I wash it?

Turn it inside out, wash it cold with like colors, and tumble dry low. Skip the bleach and do not iron directly on the print.

Shop all 100 Days of School shirts