Since I expect to be busy with #ATO2017 tomorrow, I thought I'd let y'all know in advance that Monday is Mole Day!
What is Mole Day? http://moleday.org/
(Not animal, birthmark, or sauce, but the chemistry unit 6.02 x 10^23 Avogadro's Number.)
Also https://www.hyperborea.org/journal/2005/08/avocados-number/ h/t @nivex