This event repeats every year forever
On this day, September 19th, in 1982, Carnegie Mellon professor Dr. Scott Fahlman invented the first emotion; the humble smiley. The image beow shows the text from the email that introduced the smiley emoticon.
According to narratively.com, every September 19th is "Emoticon Day". Dr. Fahlman hands out cookies with smiley faces on them.