National Mole Day, USA

Mole Day is celebrated among chemists on October 23, between 6:02 a.m. and 6:02 p.m (i.e. 6:02 10/23 in an American date style). The time and date are derived from Avogadro’s number, which is 6.02×1023, defining the number of molecules in a mole, one of seven basic SI units.

Categories: science, calendar-customs