World Hello Day Nov 21, 2025

World Hello Day

This harbor 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

Nov 21, 2018A showcase for future fame
Nov 21, 2019Le Beaujolais nouveau est arrivé!
Nov 21, 2020Headed to the High Country
Nov 21, 2021The Great Glen
Nov 21, 20222022 FIFA World Cup
Nov 21, 2023Gray seal pup, Norfolk, England
Nov 21, 2024Lion cubs, South Africa

More Desktop Wallpapers:

Oct 13, 2018‘Hello’ from zero degrees longitude
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Apr 30, 2020What kind of bird laid these eggs?
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Feb 2, 2021Did it see its shadow?
Aug 9, 2019In the Supertree Grove
Jan 28, 2021Avatars of the Wolf Moon
Jan 8, 2023Breckenridge, Colorado
Apr 4, 2018Mexican giant cardon cactus
Mar 7, 2018Chapel of St. Michel on Lake Serre-Ponçon, Hautes-Alpes, France
May 14, 2025Porto Flavia, Sardinia, Italy
Aug 12, 2025World Elephant Day
May 31, 2025Knuthöjdsmossen, a nature reserve in Sweden
Feb 22, 2019A rest stop for the birds
Apr 10, 2019Siblings that play together…
Apr 24, 2019Cool water in the Quinault
Aug 10, 2024Joshua Tree National Park, California
Jun 9, 2018Yarn bombing in the village of Gurnard, England
May 28, 2023Tegallalang terrace farms in Ubud, Bali, Indonesia
Aug 1, 2019Hawaii Volcanoes National Park turns 103
Jan 16, 2026Leopard at Etosha National Park, Namibia
Aug 9, 2022International Day of the World s Indigenous Peoples
Jan 8, 2020Take the stairs
May 1, 2025Lei Day in Hawaii
Nov 5, 2022Tigh Mor Trossachs on Loch Achray, Scotland
Jun 1, 2020The largest living organism on Earth
Sep 26, 2020Wandering Watkins Glen
May 24, 2018East River crossing
Jul 26, 2024Summer Olympics begin in Paris
Oct 30, 2020Who s there? The largest owl in the world