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

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Oct 30, 2021Central Highlands of Vietnam
Feb 21, 2023New Orleans for Mardi Gras
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Jan 30, 2025La Brecha de Rolando (Rolands Breach), Spain
Jul 24, 2024Cousins Day
Dec 31, 2022New Year s Eve in Sydney, Australia
May 19, 2018At ease, it’s Armed Forces Day
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