Mole Day

October 23, Monday

Mole Day
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Mole Day is an unofficial holiday celebrated among chemists, chemistry students and chemistry enthusiasts on October 23, between 6:02 a.m. and 6:02 p.m., making the date 6:02 10/23 in the American style of writing dates. The time and date are derived from the Avogadro number, which is approximately 6.02×1023, defining the number of particles (atoms or molecules) in one mole (mol) of substance, one of the seven base SI units.

Many high schools around the United States, Canada celebrate Mole Day as a way to get their students interested in chemistry, with various activities often related to chemistry or moles.

Mole Day

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Mole Day in other years

Mole Day in other countries

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