This is our day guide for Wednesday September 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 September 17th 2025

Day of People's Unity

Day of People's Unity

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

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Teachers Day

Teachers Day 👩‍🏫

Find out the dates, history and traditions of Teachers Day

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World Patient Safety Day

World Patient Safety Day

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

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Constitution Day and Citizenship Day

Constitution Day and Citizenship Day

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

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National Apple Dumpling Day

National Apple Dumpling Day

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

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Public Holidays on September 17th 2025

National Heroes' Day

National Heroes' Day

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

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Day of Melilla

Day of Melilla

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

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Birthday of HRH Crown Prince

Birthday of HRH Crown Prince

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

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