For all of you chemists out there, you now have an official holiday to celebrate Avagadro - National Mole Day is on October 23rd. This event is celebrated annually on October 23 from 6:02 a.m. to 6:02 p.m. Get it 6.02 x 10^23!

Here is the official homepage for the National Mole Day Foundation

By the way, I must give credit to the original poster of this event - jithomps, who mentioned this first in the General Forum