Mole Day 2026 Countdown details
There are 141 days until Mole Day on Friday, 23 October 2026.
- 📅 141 days
- 📅 20 weeks and 1 day
- 🕐 3384 hours
- 🎬 150 Star Wars marathons
About Mole Day 2026
Mole Day is an unofficial chemistry holiday celebrated every year on October 23 (10/23), chosen to honour Avogadro's number — 6.02 x 10^23 — the foundation of the mole unit in chemistry. It is observed from 6:02 AM to 6:02 PM, making the date and time a direct nod to the famous constant. Mole Day gives students and chemistry enthusiasts worldwide an excuse to celebrate science with themed puns, activities, and treats. Count down the days until Mole Day with our live countdown timer.
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When is Mole Day 2026?
See dates for Mole Day in other years.
When is Mole Day? →Frequently Asked Questions about Mole Day
How many days until Mole Day?
There are 141 days until Mole Day on Friday, 23 October 2026.
What date is Mole Day?
Mole Day falls on Friday, 23 October 2026.
How many weeks until Mole Day?
We've got 20 weeks and 1 day to wait before Mole Day.
How many months until Mole Day?
Mole Day is coming in about 5 months, on Friday, 23 October 2026.
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