Day Guide for Thursday September 17th 2026 What are the holidays on September 17th 2026?

This is our day guide for Thursday September 17th 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 17th 2026

Angola: National Heroes' Day

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

Regional

Bhutan (regional): Thimphu Drubchen

Celebrated three days before Thimphu Tshechu, this festival dates back to the early 18th century.

Regional

Spain (regional): Day of Melilla

Melilla only. Marks the taking of the city by Duke of Medina Sidonia in 1497

Tonga: Birthday of HRH Crown Prince

The current heir to the throne was born on September 17th 1985

Vatican City: St Robert Bellarmine's Day

A public holiday is observed to mark the current pope's name day.

Observances on September 17th 2026

USA: Constitution Day and Citizenship Day

One of the most patriotic holidays, today celebrates both the constitution and citizens of the USA.

USA: National Apple Dumpling Day

Find out the dates, history and traditions of National Apple Dumpling Day

Honduras: Teachers Day

Find out the dates, history and traditions of Teachers Day

International: World Patient Safety Day

World Patient Safety Day was established to enhance global understanding of patient safety

Belarus: Day of People's Unity

Find out the dates, history and traditions of the Day of People's Unity in Belarus.

USA: National DEI Day

Celebrate National DEI Day by embracing diversity, equity, and inclusion. Join in meaningful conversations to build a more united and equitable society.

September 16th 2026 | Go to Today | September 18th 2026


Choose a Day
General Information for September 17th 2026
There are 5 public holidays today.
Day 260 of 2026
105 days left in 2026
Week 38 of the year
On this Day in History
1980 - After weeks of strikes at the Lenin Shipyard in Gdansk, Poland, the nationwide independent trade union Solidarity is established.
1630 - The city of Boston, Massachusetts is founded.
1629 - The rescue of the Batavia by the Sardam coincides with the defeat of the mutineers in the Dutch East Indies.
1462 - The Battle of Swiecino (also known as the Battle of Zarnowiec) is fought during Thirteen Years' War.