If you click on my parenting category, you'll see that we've had various adventures explaining religion to our kids. (In a nutshell, it's not a topic that we have reason to talk about often, but we don't want it to be a grand mystery to our kids.)
The other day, I was on a walk with Leo, and he turned to me with a question:
"Mom, why is Julius Caesar so important that they started the calendar on his birthday?"
My first reaction was: "Wha....? What are you talking about?"
Then it hit me. We've been reading a lot of Asterix comics lately, and they famously all start with the same page, explaining that the year is 50 B.C. -- which in French is "the year 50 before J.C.." Julius Caesar is an important character in the series (the leader of the known world the story is set in), and he's sometimes called by his initials "J.C."
So, I started racking my brain, trying to think of how to explain the whole Christian calendar thing. "Well, you see, Leo, the 'J.C.' of the calendar isn't actually Julius Caesar..." I began.
"Haha, I know! It's Jesus Christ!! Hahahahahahaha!"