October 23rd is the correct day for the term. It's mole day every year celebrated on October 23rd from 6:02A.M. until 6:02P.M. It celebrates the mole which is a basic measuring unit in chemistry. The founder of the measurement was Avogadro back in the late 1700's and the early 1800's, of which he did not recieve recognition until after his death. They came up with the term to make it easier to use in equations. The actual equation is 6.022 137 × 10²³ . Or you could look at it this way. A mole is an incredibly large collection of stuff. It is a set of 6.022 137 × 10²³ things. That's 602 sextillion, 213 quintillion, 700 quadrillion items. Or...one mole 602,213,700,000,000,000,000,000 units.
I learned this doing a school project with the young-uns.
http://www.vu.union.edu/~stodolan/mole.html
Just thought I would share, thanks guys