This is our day guide for Sunday September 20th 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 September 20th 2026

International Day of University Sport

International Day of University Sport

International Day of University Sport (IDUS) is celebrated on 20 September and was officially proclaimed by the United Nations Education, Science and Culture Organisation (UNESCO).

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National Punch Day

National Punch Day

Find out the dates, history and traditions of National Punch Day

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National Gibberish Day

National Gibberish Day

Find out the dates, history and traditions of National Gibberish Day.

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National Pepperoni Pizza Day

National Pepperoni Pizza Day 🍕

Find out the dates, history and traditions of National Pepperoni Pizza Day.

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National Queso Day

National Queso Day 🧀

Celebrate the cheesy delight of National Queso Day on September 20th with dips, flavors, and fun at your favorite Tex-Mex spot or at home!

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Public Holidays on September 20th 2026

Ragamuffin War Anniversary

Ragamuffin War Anniversary

Rio Grande do Sul. Marks the start of the Ragamuffin War in 1835.

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Swiss Federal Fast

Swiss Federal Fast

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

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