The Smiley turns 25 on the 19th! 🙂

Check the date correction on the Wikipedia article, though:

19-Sep-82 11:44 Scott E Fahlman 🙂
From: Scott E Fahlman

I propose that the following character sequence for joke markers:

🙂

Read it sideways. Actually, it is probably more economical to mark
things that are NOT jokes, given current trends. For this, use

🙁