Mole Day 2099

Friday, 23 October 2099

Mole Day is a celebration of chemistry observed on 23 October, honouring Avogadro's number (6.02×10²³) and encouraging interest in science through educational activities and events.

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Frequently asked questions

When is Mole Day 2099?
Mole Day 2099 is on Friday, 23 October 2099.
What day of the week is Mole Day 2099?
It falls on Friday.
How is Mole Day calculated?
This event is observed every year on 23 October.