This is our day guide for Sunday August 17th 2025 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 2025

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 2025

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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