International Mountain Day Dec. 11, 2023

International Mountain Day

Peek at your calendars! December 11 is International Mountain Day, a special day designated by the United Nations General Assembly back in 2003. The theme for this year"s commemoration is "Restoring mountain ecosystems," connecting with the UN"s Decade on Ecosystem Restoration.

© Hung Chung Chih/Shutterstock

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Today in History

Floating mailboxes
Dec. 11, 2024International Mountain Day
Dec. 11, 2025International Mountain Day

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Walking a rocky rainbow
This lesson is going swimmingly
May 13, 2024Fish River Canyon, Namibia
Aug. 27, 2024Young black caiman, Tambopata National Reserve, Peru
Nov. 2, 2023Death Valley National Park, California
Jul. 17, 2024Rothenburg ob der Tauber, Bavaria, Germany
Jul. 21, 2024Kendwa village, Zanzibar, Tanzania
Aug. 26, 2023Berlin Cathedral and Museum Island, Berlin
We’ve made it to Halfway Day!
Why are blackbirds tied to winter?
Nov. 15, 2025Irohazaka Road in autumn, Nikko, Tochigi, Japan
Get in tune with International Jazz Day
Jun. 11, 2024A group of Southern gemsbok in the savannah, Botswana
Oct. 17, 2024Kochia, Hitachi, Ibaraki Prefecture, Japan
Dec. 28, 2023Humpback whale, Disko Bay, Greenland
Apr. 18, 2026World Heritage Day
Oct. 10, 2025Fiji Day
Jul. 30, 2024San Gimignano, Siena, Italy
Mar. 1, 2025Aurora borealis over Maligne Lake in Alberta
Nov. 6, 2023Lago Pehoé, Torres del Paine National Park, Chile
Dec. 3, 2023Vermilion Cliffs National Monument
Sep. 27, 2023Via Krupp, Capri, Italy
Living rock
Jan. 2, 2026Aerial view of Venice, Italy
A grove glows green
Sway with the Amazonian canopy
Mar. 15, 2024Abbotsford, British Columbia
Nov. 24, 2025Gwalior Fort, Madhya Pradesh, India
A chocolate lovers favourite fruit
Nature’s own canvas