Today is Mule Day, marking importation of the first Spanish jack to the U.S., a gift from King Charles III of Spain to George Washington, on October 26, 1785. Washington, a mule enthusiast, named his donkey Royal Gift and went on to breed him to the mares of the finest families in the Confederate of the United States.

In case you’re interested in this fascinating subject, a mule is the sterile offspring of a mare (female horse) and a jack (male donkey or scientifically the domesticated ass.) The opposite combination (a jennet, a female donkey) and a stallion (male horse) produces a hinny. If you’re wondering why there are more mules than hinnies (and I know you are,) you can get more info here
http://www.ruralheritage.com/mule_paddock/hinny_whynot.htm
Disclaimer: The information on this website is accurate to the best of my knowledge at the time of writing. I make no guarantee as to its accuracy. Its purpose is to inform, educate, amuse, and raise awareness about causes and opportunities around the globe. I also encourage civil debate in the comments.