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?

Observances on August 17th 2026

Prekmurje Reunification Day

Prekmurje Reunification Day

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

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National Thrift Shop Day

National Thrift Shop Day

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

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Black Cat Appreciation Day

Black Cat Appreciation Day

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

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Cupcake Day

Cupcake Day

Find out the dates, history and traditions of Cupcake Day

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Public Holidays on August 17th 2026

San Martin's Day

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.

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Discovery Day

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.

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Assumption Day

Assumption Day

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

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Independence Day

Independence Day

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

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Independence Day

Independence Day

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

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Bennington Battle Day

Bennington Battle Day

This state holiday in Vermont marks an important victory by the Americans in the Revolutionary war on 16 August 1777.

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