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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Mar. 22, 2025Happy World Water Day!
Sep. 16, 2024Wallabies at sunrise, Australia
Feb. 28, 2025Bighorn sheep in Valley of Fire State Park, Nevada, United States
Sep. 1, 2025Yellowstone National Park, Wyoming, United States
Mar. 25, 2024Happy Holi!
Oct. 18, 2023Kodiak National Wildlife Refuge, Alaska
An ocean of stars above the desert
Hovering over harmonious horticulture
Feb. 12, 2024Volcán Alcedo giant tortoise, Isabela Island
The grass looks greener on this side
Nov. 27, 2025Eastbourne Pier, East Sussex, England
May 13, 2025Yoho National Park, British Columbia
Nov. 4, 2025Tower Bridge, London, England
Oct. 28, 2023Castilla-La Mancha, Spain
Oct. 24, 2023Füzér Castle in the Zemplén Mountains, Hungary
Feb. 7, 2024St. James Tidal Pool, Cape Town, South Africa
Jul. 29, 2024International Tiger Day
Apr. 10, 2024Siblings Day
Nov. 12, 2025Colosseum, Rome, Italy
Mar. 26, 2025Vancouver Cherry Blossom Festival
What are these beautiful sandy waves?
Oct. 1, 2025Clark Range, Yosemite National Park, California, United States
Nov. 13, 2024Sea lion in a kelp forest, Baja California, Mexico
Sep. 27, 2025Red maple
Feb. 29, 2024Leap Day
Behold the architectural marvel
A sea of humanity
Locals know this place simply as ‘the Met’
A labyrinth of luxury
Dec. 15, 2023SantaPark, Lapland, Finland