September 17, 2026

World Calendar Day

World Street Corner Music Day

A day for songs heard from passing cars, markets, radios, festivals, windows, workplaces, and family gatherings.

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Regional/Cultural Day

United States Deep Cleaning Day

A useful nudge to move the chair, check the corner, wipe the forgotten shelf, and give the home a proper reset.

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Regional/Cultural Day

Receipt Drawer Day

A day for the proof of purchase nobody can find until the warranty is over.

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Regional/Cultural Day

Bluetail Damselfly Day

They have blue tails. The males are metallic blue. The females are green. You find them at the pond.

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Regional/Cultural Day

Animals of Greece Day

You encounter Mediterranean monk seals, Cretan wild goats, and various hawk and eagle species across Greece's islands and mainland. You see that Greek households most commonly keep dogs and cats, with many families also keeping songbirds in cages. ACADA celebrates the world's pets, and helps assure better care.

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Regional/Cultural Day

Products of North Korea Day

You encounter Koryo brand cosmetics and ginseng products, symbols of North Korean state manufacturing and traditional medicine promotion. You understand these represent the regime's emphasis on self-reliance and the historical significance of Korean ginseng in East Asian wellness traditions.

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Regional/Cultural Day

Constitution Day

On September 17, 1787, the Constitution was signed. In Philadelphia, they celebrate at Independence Hall. The document begins with "We the People," which was written by Gouverneur Morris, who had a wooden leg and a way with words. The Constitution has been amended 27 times. The first ten amendments are the Bill of Rights. The 18th Amendment banned alcohol. The 21st Amendment unbanned it. This is the only time the Constitution was used to cancel itself.

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