Day Guide for Friday September 18th 2026 What are the holidays on September 18th 2026?

This is our day guide for Friday September 18th 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?

Holidays on September 18th 2026

Angola: National Heroes' Day (in lieu)

Marks the birthday of the national hero Agostinho Netowho was born on this day in 1922.

Not a Public Holiday

Armenia: Exaltation of the Holy Cross

Celebrates the return of the Holy Cross to Jerusalem following its capture by the Persians

Chile: Independence Day

On September 18th 1810, Chile broke from Spanish rule, declaring their independence. The Spanish had ruled Chile since the middle of the Sixteenth Century

Observances on September 18th 2026

International: Grenache Day

Grenache is a popular red wine that grows in hot and dry conditions.

USA: National POW/MIA Recognition Day

Find out the dates, history and traditions of National POW/MIA Recognition Day

USA: National Trademen Day

Find out the dates, history and traditions of National Trademen Day

USA: National Cheeseburger Day

Some of the observances and national days on this site are cheesy.

USA: National HIV/AIDS and Aging Awareness Day

This day brings attention to the growing number of people living long and full lives with HIV and to their health and social needs.

International: World Bamboo Day

Discover the eco-friendly beauty of bamboo on World Bamboo Day - September 18th! Explore sustainable uses, cultivation, and its positive impact on the environment.

United Nations: International Equal Pay Day

Discover International Equal Pay Day, observed on September 18th. Learn about the history and importance of the gender pay gap and how to advocate for equal pay in your community.

September 17th 2026 | Go to Today | September 19th 2026

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General Information for September 18th 2026
There are 3 public holidays today.
Day 261 of 2026
104 days left in 2026
Week 38 of the year
On this Day in History
1870 - Old Faithful Geyser is observed and named by Henry D. Washburn during the Washburn-Langford-Doane Expedition to Yellowstone.
1810 - First Government Junta in Chile. Though supposed to rule only in the absence of the king, it is in fact the first step towards independence from Spain, and is commemorated as such.
1809 - The Royal Opera House in London opens.
96 - Nerva is proclaimed Roman Emperor after Domitian is assassinated.