Christmas Jumper Day Ideas: DIY a Jumper You Already Own
The best Christmas jumper day ideas don't start at a shop. They start with a plain jumper you already own, turned festive with safety-pinned felt, removable patches, fairy lights or a pom-pom nose, then taken back off in January. Below: no-sew DIY methods, outfit ideas for school and work, charity shop tips and funny themed jumpers.
If your problem is that you buy a new novelty jumper every December and forget last year's is in a drawer, WORN is being built to remember what you own for you: Start my outfit diary
What Christmas Jumper Day is and when it is
Christmas Jumper Day is a UK fundraising day run by Save the Children. Schools, unis and offices wear festive jumpers and donate a small amount to the charity. It's been going for over a decade and is now a fixture of the UK school calendar.
- When is it? It's usually held on a weekday in early to mid December. Check Save the Children UK's website for the exact Christmas Jumper Day 2026 date, since it moves each year.
- Jumper vs sweater: "jumper" is the UK word. In the US and Canada it's a sweater, and the same idea shows up as Ugly Christmas Sweater Day or holiday sweater parties at school and work.
- The catch: a lot of people buy a brand-new jumper just for one day. Which is kind of the opposite of the spirit.
DIY a Christmas jumper you already own
Here's how to make a Christmas jumper from your normal wardrobe. Start with any plain knit or sweatshirt in red, green, navy, white, cream or grey.
Step-by-step homemade Christmas jumper
- Pick the base. A plain jumper or crewneck sweatshirt. Solid colors work best.
- Pick one idea. A face (reindeer, Rudolph, snowman, elf), a scene (tree, snowflakes, presents) or a word ("Merry," "Ho Ho No").
- Cut shapes from felt or old fabric. Felt doesn't fray, so no hemming needed.
- Lay it out flat on the jumper and take a quick photo so you remember the layout.
- Attach it removably (see the next section).
- Add one "wow" detail: a pom-pom, tinsel trim or a jingle bell.
That's a DIY Christmas jumper in about 30 minutes, and it goes back to being your normal jumper afterward.
No-sew and removable decorations
The golden rule for a no-sew Christmas jumper: nothing permanent on a jumper you actually love.
| Method | Good for | Removes cleanly? |
|---|---|---|
| Safety pins | Felt shapes, tinsel, patches | Yes |
| Iron-on patches on a spare cloth, pinned on | Letters, logos | Yes |
| Brooches and badges | Quick festive detail | Yes |
| Battery fairy lights, pinned inside | Glow-up effect | Yes, keep batteries away from skin |
| Tinsel tacked with a few big stitches | Trim on hems and cuffs | Yes, snip the thread |
| Fabric glue | Permanent designs | No, only on a jumper you're giving over to Christmas |
Removable Christmas jumper decorations that look great
- Rudolph: two brown felt antlers pinned at the shoulders, a red pom-pom nose in the middle.
- Snowman: three white felt circles down the front, black button "coal," a scrap scarf.
- Christmas tree: green felt triangle, mini pom-pom baubles, a yellow felt star.
- Present: ribbon pinned in a cross across the whole jumper, a bow at the collar.
- Snowflakes: white felt or paper doily snowflakes scattered and pinned.
Christmas jumper day outfit ideas
The jumper is the star. Everything else should be simple.
Christmas jumper ideas for school
- With uniform: many schools let you swap the school jumper for a festive one for the day. Keep your usual trousers or skirt and shoes.
- Non-uniform day: jumper, jeans, trainers. Add a Santa hat if you're committed.
- Cold school: layer a collared shirt underneath so the collar pops out. Looks tidy, stays warm.
Christmas jumper day outfit for work
- Jumper + dark trousers or a skirt + your normal work shoes.
- Keep it one novelty piece. A light-up jumper and reindeer antlers and bauble earrings is a lot for a 9am meeting.
What to wear on Christmas Jumper Day without a Christmas jumper
- Any red or green knit plus festive accessories: a Santa hat, bauble earrings, tinsel scarf.
- Pin felt shapes onto a hoodie.
- Borrow one. A sibling, parent or flatmate almost definitely has one.
Real talk: the reason people end up with five Christmas jumpers is that nobody remembers what they already own by the time December comes round. WORN is planned as an outfit diary that remembers for you: one photo a day of what you actually wore, no tagging or cataloguing. Next December, you'd scroll back and see last year's jumper instead of buying another. Start my outfit diary
Charity shop Christmas jumpers
If you truly have nothing to DIY, charity shops (UK) or thrift stores (US and Canada) are the best place to find a charity shop Christmas jumper, and it fits the whole point of the day better than a fresh fast-fashion one.
- Go early. Shops put out festive knits from November and the good ones go fast.
- Check the whole rack. Novelty jumpers get mixed in with regular knits.
- Look for plain bases too. A $5 / £4 red jumper plus your own DIY beats a pricey novelty one.
- Donate it back in January if you won't wear it again.
Funny and themed jumper ideas
Want to win the office or class vote? These funny Christmas jumper ideas are all DIY-able.
- "Sleigh all day" in felt letters. Gen Z approved.
- The Grinch: green jumper, a felt Grinch smirk, a tiny Santa hat.
- Christmas tree with real ornaments: lightweight plastic baubles pinned on (not glass).
- Brussels sprout: green jumper, a felt face. Deeply divisive, which is the joke.
- Gift-wrapped you: ribbon cross and a gift tag reading "Do not open until 25th."
- Group idea: each friend is one reindeer, with names pinned on. Someone has to be Rudolph.
- Mince pie: beige base, felt "pastry" star.
- Couples or besties: one "Naughty," one "Nice."
Christmas jumper day fundraising ideas
Want to raise more than the donation? Try a class vote on the best DIY jumper (small entry fee), a bake sale, or a "guess the number of pom-poms" jar. Keep it simple and let your school or workplace handle the actual donation to Save the Children.
If a winter dance is coming up too, here's what to wear to a winter formal without buying a new outfit, and for more dress-up days from your wardrobe, check out our closet cosplay ideas.
Know what you already own before December
Christmas jumper day ideas get way easier when you know what's in your wardrobe before you panic-buy. WORN is a planned outfit diary: one photo a day, and after a month it tells you the four things you really wear and the twelve you never touch. Your photos stay private by default. Join the waitlist and get one email when it opens.
FAQ
What can I wear for Christmas Jumper Day if I don't have a Christmas jumper?
Wear any red, green or white knit and add festive accessories like a Santa hat, bauble earrings or a tinsel scarf. You can also safety-pin felt shapes onto a plain jumper or hoodie for a quick homemade Christmas jumper.
How do you make a Christmas jumper without sewing?
Cut shapes from felt, then attach them with safety pins, brooches or iron-on patches on a backing you pin on. That makes a no-sew Christmas jumper you can take apart after the day and wear normally again.
When is Christmas Jumper Day 2026 in the UK?
Save the Children usually holds Christmas Jumper Day on a weekday in early to mid December. Check the charity's official site for the confirmed 2026 date, since it changes each year.
What are good DIY Christmas jumper ideas for school?
Rudolph (felt antlers and a pom-pom nose), a snowman, a Christmas tree with plastic baubles, or a gift-wrapped jumper with ribbon. Keep decorations pinned rather than glued if it's your everyday school jumper.
Is Christmas Jumper Day the same as Ugly Sweater Day?
Pretty much. Christmas Jumper Day is the UK's Save the Children fundraiser, while Ugly Christmas Sweater Day is the US and Canadian version of wearing a festive, over-the-top sweater, often at school or work parties.