International Box Day
June 19
About International Box Day
International Box Day falls on 19 June each year, celebrating the irresistible fascination that cats have with cardboard boxes. From humble domestic moggies to lions at wildlife reserves, felines across the species appear unable to resist the allure of a cardboard box, and this lighthearted day encourages cat owners everywhere to give their pets a box to enjoy while sharing the fun on social media.
How to Celebrate International Box Day
There are plenty of ways to mark the occasion, whether you have one cat or five. Here are some ideas to make the most of International Box Day 2026:
- Raid the recycling – Gather every cardboard box you can find, from cereal packets to delivery boxes, and lay them out for your cat to investigate. Variety is key: different sizes, shapes, and orientations will keep your cat busy for hours.
- Build a box fortress – Stack, tape, and cut interconnected boxes into a multi-room cat palace. Cut holes in the sides so your cat can move between chambers, and watch them navigate their new kingdom with immense satisfaction.
- Join them inside – For a genuinely unique experience, flatten a large box and sit or lie inside it with your cat. You might gain a small insight into why they love enclosed spaces so much.
- Host a cat box party – Invite friends who have cats over and create a communal play area with dozens of boxes. Supervise the cats, take plenty of photos, and enjoy the entertainment.
- Decorate the box – Grab some pet-safe paint or non-toxic markers and customise a box into a castle, spaceship, or racing car for your cat. It makes for a great photo opportunity and a fun afternoon project.
- Film and share – Document your cat’s box adventures and post them on social media using #InternationalBoxDay and #InternationalBoxDay2026. Cat content performs brilliantly online, and you might just inspire others to do the same.
- Donate boxes to a rescue – Cat rescues and shelters can always use clean cardboard boxes for bedding, enrichment, and transport. Bundle up your spare boxes and drop them off at your nearest rescue centre.
- Try big cat enrichment videos – Search online for footage of lions, tigers, and cheetahs at wildlife sanctuaries interacting with oversized boxes. It is both entertaining and a reminder that the love of a good box runs deep in feline DNA.
What is International Box Day?
International Box Day is an annual celebration held on 19 June dedicated to the enduring connection between cats and cardboard boxes. The day is observed by cat owners, animal lovers, and pet content creators across the globe, who mark the occasion by giving their cats boxes to play in, sharing photos online, and generally indulging one of the internet’s most beloved themes. It is light-hearted by nature, but it also draws attention to the genuine psychological benefits that enclosed spaces provide for felines.
If you are new to cat observance days, you might also enjoy Hug Your Cat Day on 4 June, which celebrates the bond between cats and their owners in a similarly affectionate way.
When is International Box Day?
International Box Day falls on Friday, 19 June 2026. The date is fixed at 19 June each year, making it simple to plan ahead and stock up on cardboard well in advance.
The History of International Box Day
The history of International Box Day is inseparable from the history of cats on the internet. As social media platforms grew through the 2000s and early 2010s, cat content became one of the defining features of online culture. Cats sitting in boxes, refusing to leave boxes, and squeezing into comically small boxes accumulated millions of views, and the cardboard box emerged as one of the most recognisable symbols of feline behaviour online.
The cardboard box itself has a longer history. The first commercial paper box was created by English firm M. Treverton and Son in 1817. By 1890, a Brooklyn printer had manufactured the first pre-cut, foldable cardboard box, and by 1895 corrugated cardboard boxes were being produced in America for commercial shipping. From these industrial origins, the humble cardboard box became one of the most widely used packaging materials in the world, and an unexpected favourite of cats everywhere.
International Box Day formalised the celebration of this quirky relationship, giving cat owners a specific date on which to mark the occasion, photograph their pets, and share the joy with others. Research from Utrecht University in the Netherlands lent scientific weight to the tradition, demonstrating that cats given access to boxes adapted to new environments significantly faster than those without, suggesting that boxes provide genuine psychological comfort and security for felines.
Fun Facts About International Box Day
- Research from Utrecht University found that cats with access to boxes showed lower stress levels and adapted to new environments more quickly than those without.
- Big cats at wildlife reserves, including lions and tigers, show the same enthusiasm for cardboard boxes as domestic cats, often jumping in and out and sitting in them contentedly.
- House cats are genetically 95.6% tiger, which may partly explain why both species share the same fondness for enclosed spaces.
- The first commercial paper box was made by English firm M. Treverton and Son in 1817, long before anyone imagined cats would become the box’s most enthusiastic admirers.
- Cats are attracted to boxes because enclosed spaces satisfy their instinct to hide, observe prey, and feel protected from potential threats, reflecting behaviours inherited from their wild ancestors.
- Each cat’s nose print is unique, just like a human fingerprint, making every cat that has ever sat in a box a truly one-of-a-kind box occupant.
Why International Box Day Matters
At its core, International Box Day is a celebration of simple pleasures: the delight of watching an animal find joy in something ordinary, and the community that forms around shared experiences online. In practical terms, it also encourages responsible pet care by highlighting the importance of environmental enrichment for cats. Providing cats with spaces to hide, explore, and feel secure contributes to their mental wellbeing, and a cardboard box is one of the easiest and most affordable ways to achieve this. The day also gives cat rescues and shelters a moment in the spotlight, as donated boxes can be put to good use for cats awaiting new homes.
Frequently Asked Questions
What is International Box Day?
International Box Day is an annual event on 19 June celebrating the love that cats have for cardboard boxes. Cat owners around the world give their pets boxes to play in and share photos and videos online using the hashtag #InternationalBoxDay.
When is International Box Day in 2026?
International Box Day in 2026 falls on Friday, 19 June 2026.
Why do cats love boxes so much?
Cats are instinctively drawn to enclosed spaces because they provide a sense of security, allow them to observe their surroundings from a concealed position, and satisfy natural hunting and hiding behaviours inherited from their wild ancestors. Research has shown that cats given access to boxes adapt to new environments more quickly and show lower stress levels.
Spread the Word
Join the celebration by sharing your cat’s best box moments on social media with #InternationalBoxDay and #InternationalBoxDay2026. Tag your fellow cat-loving friends and challenge them to give their own pets a box to enjoy. The more the merrier on this most cardboard of days.
Related Awareness Days
- Hug Your Cat Day – Celebrated on 4 June each year, this day encourages cat owners to show their feline companions some extra affection and appreciation.
- Cat World Domination Day – Observed on 24 June, this tongue-in-cheek celebration acknowledges that cats have already conquered the internet and invites owners to bow to their feline overlords for the day.
- International Cat Day – Held on 8 August, International Cat Day is one of the biggest celebrations of cats in the calendar, raising awareness of cat welfare alongside the fun.
Links
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