International Mountain Day Dec. 11, 2023

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.

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Today in History

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

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A city so nice, they made it twice
Mar. 4, 2024Arenal Volcano, Costa Rica
Jul. 12, 2024Mount Rainier National Park
May 2, 2024Craters of the Moon National Monument and Preserve, Idaho, USA
Oct. 28, 2025The Gothic Gate in the Adršpach-Teplice Rocks, Czechia
Feb. 17, 2024Sassnitz lighthouse, Rügen, Mecklenburg-Western Pomerania
Blood moon
Is it green with envy?
Nov. 23, 2025Fibonacci Day
Jun. 1, 2025World Reef Awareness Day
Mar. 20, 2025Spring equinox
Nov. 29, 2024Mont-Saint-Michel, Normandy, France
Nov. 6, 2024Shi Shi Beach, Olympic National Park, Washington, United States
Jun. 25, 2025Glastonbury Festival begins
Apr. 20, 2024Grand Prismatic Spring at Yellowstone National Park, Wyoming, USA
Aug. 25, 2024Glacier National Park, Montana, USA
The other continent down under
Oct. 26, 2023Schönbrunn Palace Park, Vienna, Austria
Aug. 18, 2025Avalanche Lake Trail at Adirondack High Peaks, New York, United States
Dec. 5, 2024Tufa formation on Mono Lake, California, United States
Jan. 1, 2024Happy New Year!
Apr. 19, 2025Zion National Park, Utah, United States
Feb. 18, 2025The Great Blue Hole, Belize
Sep. 4, 2024Dusky eagle-owls, Pakistan
Pretty in pink
Sep. 26, 2025Least chipmunk, Kootenai National Forest, Montana, United States
Turtle-y nice day for a swim
Apr. 7, 2024International Beaver Day
Tomb of the Golden Pharaoh
Oct. 24, 2023Füzér Castle in the Zemplén Mountains, Hungary