International Day of the Tropics

International Day of the Tropics, observed annually on June 29, celebrates the extraordinary diversity, culture, and global importance of the tropical regions while recognizing their pressing challenges and future potential.

History of International Day of the Tropics

The United Nations first designated June 29 as International Day of the Tropics in 2016, aligning it with the anniversary of the inaugural “State of the Tropics Report” released in 2014—an initiative spearheaded by Nobel Laureate Aung San Suu Kyi and leading tropical research centers. “State of the Tropics Report” — a collaboration between twelve leading research institutions. The report provided a landmark analysis of the region’s progress and challenges. The first official observance followed in 2017, marking a turning point in global engagement with tropical ecosystems.

In 2016, the United Nations General Assembly officially recognized June 29 as the International Day of the Tropics (via resolution A/RES/70/267). Since then, this day has served as a reminder of the crucial role tropical countries play in achieving the Sustainable Development Goals—and why supporting them matters to everyone, everywhere.

Since then, the UN and partners like the Food and Agriculture Organization have hosted events—both in-person and virtual—to share tropical stories, assess development progress, and foster collaboration among nations in these regions. Each year, the day spotlights how tropical areas contribute significantly to the Earth’s biodiversity, economy, and culture. ¹

Why is International Day of the Tropics important?

It’s remarkable how this observance reframes our connection to tropical regions—not as distant rainforests or exotic landscapes, but as critical foundations of planetary health and human well‑being. When we pause to celebrate the tropics, we’re acknowledging the forests, reefs, and communities that sustain half the world’s population and hold two‑thirds of its biodiversity.

But it’s also a heartfelt reminder: tropical regions are under threat from deforestation, urban pressures, climate shifts, and inequality. By focusing global attention on these issues—through storytelling, policy dialogues, and shared science—the day builds solidarity and urgency around solutions rooted in respect, equity, and sustainability.

• It highlights ecosystems that host most of Earth’s biodiversity and human lives
• It raises global awareness of climate, social, and development challenges in the tropics
• It encourages nations to share successes and best practices from tropical communities
• It personalizes the UN’s sustainable development goals through the eyes of tropical people
• It sparks conversations and actions that ensure tropical stewardship and resilience

The future is tropical

The International Day of the Tropics honors the incredible richness of the tropics while spotlighting the challenges and promise that shape the region’s future. It’s a moment to celebrate tropical cultures, ecosystems, and achievements—and to reflect on how far these regions have come, and how much potential still lies ahead. This day encourages the world to take a closer look at life in the tropics: sharing stories, celebrating successes, and fostering collaboration. It also highlights the complex issues facing tropical nations—from climate and environmental threats to social and economic development needs.

The tropical ecosystem

Stretching between the Tropic of Cancer and the Tropic of Capricorn, the tropics are home to lush rainforests, vibrant biodiversity, and warm climates. Though day-to-day temperatures stay fairly steady, rainfall patterns can vary dramatically—especially as you move further from the equator.

But alongside natural beauty comes vulnerability. Tropical areas are on the front lines of climate change, deforestation, and urbanization. These environmental pressures are reshaping ecosystems and testing the resilience of communities that depend on them.

People of the tropics

Tropical countries have made impressive strides in development, but they also face unique challenges. As of now, the tropics experience higher rates of poverty and undernourishment compared to other regions. A larger share of urban residents live in slum conditions, and demographic shifts are accelerating.

By 2050, the tropics will be home to most of the world’s population and two-thirds of its children. The stakes are high, and the region’s progress will have global ripple effects. Supporting these nations in achieving sustainable development is not just a local goal—it’s a global imperative.

How to Observe International Day of the Tropics

You don’t need to travel to feel connected to the tropics. Pick a documentary, podcast, or book that features tropical landscapes or communities—learning their stories is a simple, powerful way to engage. Many such resources are shared by UN and environmental organizations around June 29.

If you’re part of a community group or classroom, consider hosting a virtual event: a photo exhibition of tropical nature, a short talk on mangroves or coral reefs, or a shared planting project of native species. These collective acts—though local—send a message of care and solidarity across borders.

• Watch or listen to stories about tropical forests, reefs, or cultures
• Host a talk, photo display, or planting event focused on tropical ecosystems
• Share tropical success stories or challenges on social media using UN hashtags
• Support fair‑trade or conservation initiatives tied to tropical landscapes
• Donate to or volunteer with groups safeguarding tropical biodiversity and communities

International Day of the Tropics Dates Table

1. https://www.un.org/en/observances/tropics-day[↩]