A rubber duck
Image credit: <a href="https://www.flickr.com/photos/davidw/">David</a> [<a href="https://creativecommons.org/licenses/by/2.0/">CC BY 2.0</a>], via <a href="https://www.flickr.com/photos/davidw/380277419">Flickr</a>

Well, you learn something new every day. I grew up watching Sesame Street, so I was of course familiar with Ernie’s bath time pal, Rubber Ducky (and the song Ernie sang about it, which will now be stuck in my head for the rest of the day). What I did not know was that Rubber Ducky has a birthday. Apparently, according to a Sesame Street calendar from 1973, that day is January 13. So, happy birthday, Rubber Ducky!