The charity initiative, which supports Save the Children, asks people to wear a Christmas jumper to work and donate to the cause.
Plus it's a great excuse to inject some festive cheer into your day!
We asked you to send us your Christmas jumper selfies and group photos and we've had some great pictures sent in so far!
Are you featured in our gallery? Click above to take a look!
It's not too late to get involved - show off your Christmas jumper and send us a picture.
Send in pictures of your kids, your mates or just yourself rocking a festive jumper and help spread some Christmas cheer.
Use the form below to send in your snaps and we'll add them to our gallery.