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 4, 2023International Cheetah Day
Jan 19, 2021The ruins of a Maya superpower
May 17, 2022Salt ponds of Maras, Peru
Jan 15, 2024Martin Luther King Jr. Day
Mar 18, 2019Next stop, Tofino
Apr 10, 2024Siblings Day
Sep 22, 2019Barcelona bids farewell to summer
Aug 3, 2022Red-necked grebes during breeding season
Oct 22, 2019Bobbing for crab apples
May 4, 2025Star Wars Day
Jun 2, 2024National Gardening Week
Sep 14, 2024Rapa Nui National Park, Easter Island, Chile
Sep 26, 2021World Rivers Day
Aug 25, 2018Happy trails for the 21st century
Jul 11, 2018All is silent for Big Ben’s musical milestone
Jun 8, 2020A day for the oceans
May 31, 2025Knuthöjdsmossen, a nature reserve in Sweden
Feb 26, 2018A leafy seadragon in the waters off Wool Bay, Australia
Mar 15, 2018The Colosseum of Rome, Italy
Feb 2, 2019Groundhog Day arrives—beyond a shadow of a doubt
Jun 4, 2021Islands that turned the tide
Oct 17, 2024Frost-covered dunes on Mars
Feb 15, 2021Presidents hear the echo of history
May 20, 2020It s World Bee Day
Mar 10, 2018Johnston Canyon in Banff National Park, Alberta, Canada
Jan 16, 2024Lake Louise, Banff National Park, Alberta
Dec 24, 2022Christmas Eve
Dec 23, 2019A Festivus for the rest of us
Nov 19, 2019Zion National Park Turns 100
Sep 9, 2021Islands of the Salish Sea