Held every year in aid of Save the Children, the campaign invites schools and workplaces across the country to join in with donning their festive knits for a good cause. This year marked on Thursday, December 8, youngsters across Sunderland showed off their best Christmas outfits, while many were raising money for charity, too.
You can share your own picture with us on Facebook here, and check out some of our Christmas jumper stars below. Thank you to everyone who has contributed a photograph.
1. Santa Ready
Reggie shows off his emoji jumper for Christmas Jumper Day. Photo: Lyndsey Chambers Trevor Coulson
2. Wrapped up warm
Bobby was ready to face the cold weather this week for Christmas Jumper Day. Photo: Andrea Teasdale Palmer
3. Grinchmas
Brennan and Lennon Bond don't look like Grinches to us! Loving the hoodies for Christmas Jumper Day. Photo: Nadia Bond
4. Roarsome!
Harry John, age 3, dons a dino-inspired jumper for Christmas Jumper Day. Photo: Natalie Brown