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

palette

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:

Dec 3, 2018Computer science on the page
Aug 5, 2021A swim in the sky
Mar 12, 2023Lucian Blaga National Theater, Cluj-Napoca, Romania
Mar 31, 2024Happy Easter!
Mar 3, 2022World Wildlife Day
Oct 30, 2020Who s there? The largest owl in the world
Jun 25, 2025Glastonbury Festival begins
Jul 4, 2018Let’s celebrate
Oct 7, 2019From the mind of Frank Gehry
Mar 8, 2019‘Think equal, build smart, innovate for change’
Jul 26, 2022Mangrove Conservation Day
Dec 9, 2022Muskoxen in Dovre-Sunndalsfjella National Park, Norway
Mar 26, 2020Gray days ahead in Monterey
Jan 3, 2019How do ladybugs winter?
Dec 19, 2019Winter at Valley Forge
Nov 17, 2022National Take a Hike Day
Nov 8, 2018Manatees rebound
Jan 8, 2023Breckenridge, Colorado
Jul 18, 2021Grand finish of Le Tour
Dec 19, 2018Hezké svátky
Sep 16, 2018Mexico celebrates its Independence Day
Nov 29, 2024Mont-Saint-Michel, Normandy, France
Aug 29, 2019Greetings from Asbury Park
Jan 1, 2023New Year s Day
Jan 14, 2020Going head-to-head with winter
Mar 29, 2020The borrowed days are here
Aug 27, 2020Rocks on the move
Aug 2, 2023Capitol Reef National Park, Utah
Aug 30, 2023International Whale Shark Day
Jun 7, 2025National Trails Day