you know Conan Gray's song Heather? well, the 3rd of December is Heather day, as he mentions in his lyrics :
"i still remember, 3rd of December, me in your sweater"
so on the 3rd of December, wear a sweater.

When some little bitchboy is acting like a little tiny pee pee poo poo baby and messing up the group plans.

3rd of December is Heather day. On the 3rd of December, you should be wearing a sweater.

3rd of December is when you give the person you like a sweater its like Conan Gray's song heather

You give someone your sweater or you just sit back and cries because no one give a damn about you.

The 3rd of December is national cum in your boxers day, but you can only do it once, then if you do it more then once you can’t ever do it again.

Give someone you love you're sweater and call them heather