All you have to do is wear a Christmas jumper on the day and make a donation to Save the Children, which they use across their campaigns. From just £2. But you can mark it any day you like and the government will double your donation.
This year, the UK government is matching donations to Christmas Jumper Day. So you donate £2 and the government donates £2 via Gift Aid. You've got till 1st March 2023.
Save the Children say that this year the donations will go to Kenya to help expectant mother and new mothers and their children. They hope to help around 200,000 people.
They've got loads of activities arranged across the country and ways to join and and even host your own events so check out their site for more info. It's really easy to sign up to get a fundraising kit or pay in your donations.
To look absolutely wonderful while helping raise money for Save the Children, get yourself one of our Christmas jumpers in time for 8th December, or for whenever you want to mark the occasion.