How many days until 23 october
What holidays do we celebrate on 23 October?
National Mole Day
National Mole Day is an unofficial chemistry holiday, celebrated between 6:02 a.m. and 6:02 p.m. The time and date are chosen because of the Avogadro number, which is 6.02×1023. Avogadro number is used to calculate the number of molecules of a substance in one mole. The holiday is celebrated at schools across the US and some other countries to spark interest in chemistry.