Just so you know about my intensely scholarly efforts this evening: I wondered what the earliest known smiley face in the world is.

It is found on a 3, 700 year Hittite pot found in Turkey, with the classic two dots and curved line.

You are welcome! 🙂

@Thoreau I like it! But I wonder if this counts?

The Makapansgat Cobble is a manuport—not a tool, nor engineered, but deliberately carried to where it was found, suggesting that the carrier recognised the face. It's a bit older—from about 3,000,000 years ago!

@lowtech hmm. It might be a face, but is it a smiley face?
@Thoreau Back in those days, maybe smiling wasn't a thing! (Australopithecines, in common with their ancestors, probably interpreted smiling as a threat.)
@lowtech I think it looks more like an Oh No Face. Which would make so much sense given its age! 😯
@Thoreau There's another face on the other side, too!