How Many Days Until October 23? Countdown
There are 53 days until Mole Day on Friday, October 23, 2026. Mole Day falls on October 23 each year. The public marker is Mole Day: 6.02×10²³. The live timer counts to midnight that morning in the timezone you pick.
2026–2028 dates
| Year | Date |
|---|---|
| 2026 | Friday, October 23 |
| 2027 | Saturday, October 23 |
| 2028 | Monday, October 23 |
Add Mole Day to your calendar
Why Americans search this date
October 23 is Mole Day for chemistry teachers, celebrated 6:02 a.m. to 6:02 p.m. for Avogadro’s number 6.02×10²³. National Boston Cream Pie Day is the same date on food lists.
How Many Days Until October 23
October 23 2026 is a Friday. Not a federal holiday. Halloween is eight days later.
| Marker | Detail | Type |
|---|---|---|
| Mole Day | 6.02×10²³ | Boston Cream Pie Day |
Countdown to Mole Day
The days-until timer still zeros at midnight, not 6:02 a.m. The remaining-days number is civil midnight, not a ceremony or store-open time. After Mole Day passes, the clock rolls to the next October 23.
Why this countdown exists
“How Many Days Until October 23” is on this site because Americans search remaining days until Mole Day, not because every square is a paid holiday. The public hook is Mole Day (6.02×10²³; Boston Cream Pie Day). The same morning is also used for weddings, travel, leases, and school dates. The timer zeros at midnight in your timezone, then repeats next year.
When is Mole Day 2026?
Friday, October 23, 2026.
Is Mole Day a US federal holiday?
No.
Does the Mole Day countdown repeat each year?
Yes. After the date passes, it rolls to the next year.