They might have had a candy cane sticky taped to the envelope or a hand-drawn doodle on the inside.
Either way, they were always warmly received and an exciting reminder that December 25 was just around the corner.
For some of us, it's a familiar tradition and a gesture we planned to pass down to our own children, but in a new dilemma shared by a mother online, the tradition has become a complicated situation in her family.
Watch: MM Confessions: Our Weird Christmas Traditions. Post continues after video.
In a post, Christina* asked parents for their advice after her child announced she didn't want to give every one of her classmates a Christmas card.
"My two daughters are in the first grade and when I asked them who they wanted to give cards to this year, I thought they would just want to write one for their main friendship group," she explained.
"But Annie* said she wanted to give cards to her whole class... EXCEPT for one boy I'm calling Billy."