When Prince Harry and Meghan Markle posted their Christmas cards this year, the key breakthroughs from that moment were, in order:

1. for the first time since her birth in June, the world finally saw the lovely Riveting Princess Diana.

2. Archie is an adorable redhead, just like his daddy.

3. Prince Harry took another opportunity to show his bare feet in public.

But the card also contained a sweet little tidbit about the family that might have been overlooked at first. The photo, taken by Aleksi Lubomirski, was accompanied by a caption that would make people like us cringe lightly:

"This year, 2021, we welcomed our daughter Lilibet into the world. Archie made us 'mommy' and 'daddy' and Lili made us family, and for 2022 we have made donations on your behalf to several organizations that honor and protect families, including those migrating from Afghanistan and American families in need of paid parental leave."

First of all, "made us a family" is a beautiful way to put it. Second, I greatly commend you for using the baby's big reveal to shout out important causes such as the relocation of Afghan refugees and Meghan's personal fight for paid parental leave.

But finally, Archie calling Prince Harry "Daddy" is actually a cute royal tradition; according to Express UK, it is also the way Prince Charles used to address his father, the late Prince Philip. According to the magazine, after Prince Philip's death in April, Prince Charles gave a nod to the appellation in a touching tribute he published earlier this year.

"My dear Papa was a very special man and, more than anything, I know he would have been surprised by the reactions and the touching things that were said about him," Prince Charles wrote. From that perspective, our family is deeply appreciative of it all."

Given the recent rumors of a feud between Harry and his father, it is especially fascinating that Archie is carrying on the tradition. Especially during the holiday season, he reminds us that family (whether by blood or by choice) is paramount.