World Hello Day Nov. 21, 2025

World Hello Day

This harbour seal, photographed at Robert Moses State Park on Long Island in New York, United States, 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

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Nov. 21, 2023Grey seal pup
Nov. 21, 2024Aspen trees, British Columbia

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Feb. 7, 2025Blue hour in Trondheim, Norway
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May 24, 2025European Day of Parks
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Jan. 15, 2026The fishing village of Reine, Norway
Apr. 3, 2025Rufous hummingbird
Aug. 11, 2025Village of Santa Maddalena, Dolomites, Italy
Apr. 26, 2024Val di Funes, Italy
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May 3, 2024The Sonoran Desert, Arizona, USA
Jan. 28, 2024Channel Country, Australia
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Oct. 27, 2025Thick-billed raven, Simien Mountains, Ethiopia
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Oct. 25, 2023Grand Staircase-Escalante National Monument, Utah
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A curious little otter pup
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Nov. 12, 2025Colosseum, Rome, Italy
Misty mountain hop
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