World Hello Day 21 Nov 2025

This harbour seal, photographed at Robert Moses State Park on Long Island, New York, seems to be onto something—spreading good vibes, one wave at a time. That"s exactly the spirit of World Hello Day, celebrated every November 21. This cheerful observance began in 1973 when two American brothers, Brian and Michael McCormack, launched it as a peaceful response to global tensions. They mailed 1,360 letters in seven languages to world leaders, inviting them to join the first celebration. Their message was simple yet powerful: personal communication can help preserve peace. Today, people in more than 180 countries participate.

© Vicki Jauron, Babylon and Beyond Photography/Getty Images

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Today in History

Kick-off in Qatar
21 Nov 2023Grey seal pup
21 Nov 2024Lion cubs, South Africa

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2 Nov 2023Death Valley National Park, California, USA
Sep 7, 2023Camels in the desert, United Arab Emirates
A deadly coast
20 Feb 2025Red deer, Canada
A sky full of stars
Check out these ‘sea cows’
Patchwork of peace
29 Oct 2023Bonaventure Cemetery, Savannah, Georgia, USA
15 Oct 2024Great wildebeest migration at Mara River, Kenya
A curious little otter pup
30 Oct 2024Edinburgh Castle, Scotland
6 May 2024The ruins of an ancient monastery, Skellig Michael, Ireland
8 Sep 2024Great North Run
18 Aug 2025Avalanche Lake Trail at Adirondack High Peaks, New York, United States
27 Aug 2024Young black caiman, Tambopata National Reserve, Peru
A public restroom or a tourist spot?
Unbe-leaf-able
Blood moon
9 Nov 2024Aït Benhaddou, Morocco
11 Feb 2025Yungang Grottoes, Datong, China
21 Mar 2026International Day of Forests
21 Dec 2024Burning the Clocks
15 Dec 2025Spiegelgracht canal in Amsterdam, Netherlands
Where is this hidden waterfall?
2 Feb 2026Groundhog Day
24 Jun 2026Pollinator Week
Happy St Andrews Day!
A little bird told me...
8 Nov 2025Bandon Beach in Bandon, Oregon, United States
21 Oct 2024Cypress trees in George L Smith State Park, Georgia, United States