Day Guide for Wednesday September 23rd 2026 What are the holidays on September 23rd 2026?

This is our day guide for Wednesday September 23rd 2026 which shows you at a glance what's happening on this day around the world. Using the calendar on this page, you can look at a day guide for any day. Why not look up your birthday to see which holidays you share it with?

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General Information for September 23rd 2026
There are 6 public holidays today.
Day 266 of 2026
99 days left in 2026
Week 39 of the year
On this Day in History
2002 - The first public version of the web browser Mozilla Firefox ("Phoenix 0.1") is released.
1868 - Grito de Lares ("Lares Revolt") occurs in Puerto Rico against Spanish rule.
1846 - The planet Neptune is discovered by the French astronomer Urbain Jean Joseph Le Verrier and British astronomer John Couch Adams; verified by German astronomer Johann Gottfried Galle.
1338 - The Battle of Arnemuiden was the first naval battle of the Hundred Years' War and the first naval battle using artillery, as the English ship Christofer had three cannon and one hand gun.