When Is 100 Days of School in Australia in 2026?
For most Australian families, the 100th day of school falls between 21 July and 7 August 2026. Victoria, New South Wales and South Australia typically celebrate around 28 July, while Queensland schools — which start the year earlier — may mark the occasion as early as 21 July. Check your school's newsletter for the exact date, as it varies by school and state.
That puts the celebration squarely in the middle of Term 3 — which means now is the time to sort your costume before stock runs low. Order by 12 July on standard post to be safe, or by 22 July on Express Post if you leave it a little later. We dispatch all orders placed before 2 PM AEST on the same business day.
The Classic Look: Old Person Costumes
The enduring favourite for 100 Days of School is, without question, the old person costume. The concept is wonderfully simple: turn up to school looking 100 years old. Kids love the transformation, teachers love the creativity, and parents love that the costume is comfortable enough to survive an entire school day.
Old Lady & Grandma Costumes
A grey wig, a pair of oversized glasses, a floral dress or cardigan, and some pearls — that is the recipe for a brilliant grandma look. Our old lady costumes range covers everything from full dress-up sets (wig, glasses, cane and jewellery all in one box) to individual accessories you can mix and match with clothes from home. It is one of the most popular categories we stock for 100 Days of School, so do not leave it too late.
Old Man & Grandpa Costumes
For boys, an old man grandpa outfit is equally iconic. Think a flat cap or grey wig, a plaid bow tie, suspenders, and maybe a walking stick. Our old man costumes range includes complete sets and individual pieces, with options that suit prep-age children right through to high school students. The walking stick prop always gets a laugh.
Grandparent Sets & Kits for 100th Day
If you want everything sorted in a single purchase, our grandparent accessory kits are the way to go. Many include a wig, glasses, pearl necklace and walking cane — everything your child needs to look convincingly 100 years old, delivered in one package. Browse the full 100 Days of School costumes range to find the right set.
Easy 100th Day Ideas Without a Full Costume
Not every family has time to pull together a complete outfit. The good news is that a few well-chosen accessories can do the job just as well. A grey bun wig and a pair of round glasses immediately read as "100 years old" even over school uniform. Add a walking cane and some clip-on pearl earrings and the look is complete in minutes.
Our 100th Day accessories range includes wigs, glasses, jewellery and canes that ship fast and arrive ready to wear — no sewing required.
Teacher 100th Day Costume Ideas
Teachers get involved too. Whether you are going for the full grandparent look or just adding a grey wig over your regular outfit, dressing up alongside your students makes the day genuinely memorable. Our Teacher 100th Day costumes section has options sized for adults, including complete sets that work well for educators who want to dress the part without spending hours planning an outfit.
The old lady costume is particularly popular with female teachers — a floral dress, grey wig and pearls over school clothes is quick to put on and easy to teach in all day. For male teachers, the flat cap and suspenders combination is comfortable and gets an instant reaction from students.
Kids 100 Days of Prep and Kindergarten Costumes
For the youngest students — those in prep, kindy or Foundation year — the 100th day celebration often has an extra layer of excitement because it is one of their first real school milestones. Small children do best with simple costumes: a short wig, a pair of lightweight round glasses, and a cardigan are enough to get the look without being uncomfortable.
Our Kids 100 Days costumes range includes sizes from toddler through to teen, so you can find the right fit regardless of your child's age. Several of our grandparent sets come in smaller sizes specifically designed for the under-fives.
100 Days Smarter: Other Creative Ideas
While the old person look dominates, there are other creative angles worth considering:
- Dress as your future self in 100 years — any old person costume works perfectly for this twist on the theme.
- 100-themed accessories — attach 100 stickers, 100 pom-poms or 100 paper dots to a plain shirt for a quick DIY option that works alongside any of our accessory kits.
- Pair the old man and old lady looks — siblings dressing as matching grandparent characters always makes for a great school photo.
Frequently Asked Questions
What do kids dress up as for 100 days of school?
The most popular choice by far is an old person — specifically a grandma or grandpa look — to symbolise being 100 years old. Other options include dressing as a future version of themselves, adding 100 decorations to regular clothes, or going as a character associated with the number 100.
When is 100 days of school in Australia in 2026?
For most Australian schools, the 100th school day falls between 21 July and 7 August 2026. Victoria, NSW and SA typically celebrate around 28 July; Queensland schools tend to celebrate a week earlier.
What accessories do I need for a grandma costume?
The core pieces are a grey wig (bun or curly), round glasses, and a pearl necklace. A walking cane and a floral cardigan or dress complete the look. All of these are available as individual accessories or as part of complete sets in our 100th Day accessories range.
Are there costumes for teachers on 100 Days of School?
Yes — our Teacher 100th Day costumes section has adult-sized grandparent sets, wigs and accessories that are comfortable to wear all day and easy to put on over regular work clothes.
How early should I order?
We recommend ordering at least two weeks before your school's celebration date. For a late-July celebration, aim to order by 12 July on standard post. Orders placed before 2 PM AEST on business days are dispatched same day.
Shop Our 100 Days of School Range
Whether you need a complete grandma set, a single grey wig, a grandpa accessory kit, or teacher-friendly costume options, you will find everything in our dedicated 100 Days of School costumes range. We stock sizes for toddlers, primary-age children and adults, with options across every budget.
Order before 2 PM AEST on any business day and your costume ships the same day. Happy 100th day!