Day Guide for Monday August 17th 2026 What are the holidays on August 17th 2026?

This is our day guide for Monday August 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 August 17th 2026

International: Assumption Day (in lieu)

The Feast of the Assumption is the principal feast of the Blessed Virgin, the mother of Jesus Christ

Argentina: San Martin's Day

San Martin is regarded as the most important Argentinian founding father, who liberated not only a part of Argentina but also helped liberate Chile and Peru along with O'Higgins and Bolívar.

Regional

Canada (regional): Discovery Day

Yukon only. Also known as Klondike Gold Discovery Day. Replaces the Civic Holiday observed on the 1st Monday of August in other areas of Canada.

Gabon: Independence Day

Marks Gabon's independence from France on August 17th 1960

Indonesia: Independence Day

Marks Indonesia's declaration of independence from the Netherlands in 1945

South Korea: Liberation Day (in lieu)

Marks the liberation of Korea from 35 years of Japanese imperial rule in 1945 after the end of the second World War.

Public sector only

USA (regional): Bennington Battle Day

Marks a 1777 battle in the War of Independence

Observances on August 17th 2026

United Kingdom: Cupcake Day

Discover the sweet celebration of Cupcake Day in the UK on August 17th. Learn about the history of these miniature cakes and find fun ways to get involved, from baking your own treats to supporting local bakeries.

USA: National Thrift Shop Day

National Nonprofit Day gives us a moment to pause and reflect on the incredible work nonprofits do every day.

Slovenia: Prekmurje Reunification Day

Marks the return of the region of Prekmurje to Slovenia control in 1919 .

USA: Black Cat Appreciation Day

Find out the dates, history and traditions of Black Cat Appreciation Day.

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

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General Information for August 17th 2026
There are 7 public holidays today.
Day 229 of 2026
136 days left in 2026
Week 34 of the year
On this Day in History
1978 - Double Eagle II becomes first balloon to cross the Atlantic Ocean when it lands in Miserey, France near Paris, 137 hours after leaving Presque Isle, Maine.
1945 - Sukarno and Mohammad Hatta proclaim the independence of Indonesia, igniting the Indonesian National Revolution against the Dutch Empire.
1914 - The Ottoman-Bulgarian alliance is signed in Sofia.
1585 - A first group of colonists sent by Sir Walter Ralegh under the charge of Ralph Lane lands in the New World to create Roanoke Colony on Roanoke Island, off the coast of present-day North Carolina.