International Day of the Tropics Jun. 29, 2025

International Day of the Tropics

Every June 29, the International Day of the Tropics shines a light on the equator-hugging zone where the sun sticks around, and climate conversations get real. The tropics span a broad region between the Tropic of Cancer and the Tropic of Capricorn, including parts of Asia, Africa, Oceania, Central America and South America. Nearly 40% of the global population lives in this band, which also hosts 80% of the world"s biodiversity. It"s rich in culture, nature and history—but also under pressure from rising temperatures, deforestation and fast-paced urban growth.

© fabio lamanna/Alamy Stock Photo

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Today in History

Celebrating the tropics
In the tropics, land greets sea warmly
Jun. 29, 2024Tour de France 2024

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Dec. 12, 2024Poinsettia Day
Aug. 6, 2025Ring-tailed lemur
What waterborne wizardry is this?
May 27, 2025Mona Vale rockpool, Sydney, Australia
Oct. 6, 2025Anshun Bridge, Chengdu, China
Oct. 11, 2023The Painted Hills, Oregon
Sep. 27, 2024Basilica of Santa Maria della Salute, Venice, Italy
Bridging past and present
Heavenly hot springs
Sep. 8, 2023International Literacy Day
Feb. 19, 2024Toledo, Spain
Aug. 29, 2023Zelenci Nature Reserve, Slovenia
Mar. 27, 2024World Theatre Day
You otter check this out
Mar. 7, 2026The Brocken, Harz National Park, Germany
Who’s snoozing?
Oct. 3, 2025Glen Brittle, Isle of Skye, Scotland
May 20, 2025World Bee Day
Dec. 14, 2025Christmas Bird Count
Feb. 3, 2024Carnival of Venice
Sep. 22, 2023World Rhinoceros Day
An iridescent view
Feb. 10, 2026Es Vedrà and Es Vedranell, Ibiza, Spain
Part science experiment, part public park
Nov. 4, 2025Tower Bridge, London, England
Sep. 13, 2024Point Reyes National Seashore, California, USA
Aug. 9, 2025International Day of the Worlds Indigenous Peoples
Oct. 28, 2024Pumpkin field, Victoria, British Columbia
The world’s greatest oasis?
Jun. 9, 2024Bardenas Reales Biosphere Reserve and Natural Park, Navarra, Spain