Mole Day (International observance)

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October 23rd, 2026

Mole Day (International observance)

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 either MDY or YMD date formats. The time and date are derived from the Avogadro constant, 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.

Source: Wikipedia Mole_Day

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