This is our day guide for Sunday September 21st 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 21st 2025

Wife Appreciation Day

Wife Appreciation Day

A gentle reminder - don't just appreciate your wife on the third Sunday in September!

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National Pecan Cookie Day

National Pecan Cookie Day

Find out the dates, history and traditions of National Pecan Cookie Day

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World Alzheimer’s Day

World Alzheimer’s Day

2 out of every 3 people globally believe there is little or no understanding of dementia in their countries.

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National Gratitude Day

National Gratitude Day 🙏

Celebrate World Gratitude Day by embracing thankfulness, enhancing well-being, and fostering global connections. Discover the power of gratitude today!

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Telegraph Pole Appreciation Day

Telegraph Pole Appreciation Day

Find out the dates, history and traditions of Telegraph Pole Appreciation Day.

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International Day of Peace 

International Day of Peace 

The International Day of Peace is celebrated annually on 21 September and is a United Nations-commissioned global holiday.

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Public Holidays on September 21st 2025

Swiss Federal Fast

Swiss Federal Fast

A Swiss government-arranged multi-denominational holiday celebrated by Christians and the Jewish community

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