International Day for Biological Diversity 2026
awarenessSaturday, May 22, 2027
249 days from today · next occurrence
About International Day for Biological Diversity
The International Day for Biological Diversity, marked every year on May 22, spotlights the astonishing variety of life on Earth, from genes and species to entire ecosystems, and the accelerating threats it faces. Rainforests, coral reefs, wetlands, grasslands, and even city parks hold interconnected webs of life that supply food, medicine, clean water, and a stable climate.
Established by the United Nations, the day accompanies the Convention on Biological Diversity, a global treaty signed by more than 190 countries. Each year a theme guides the message, with past focuses including marine biodiversity, pollinators, forest restoration, and solutions drawn from nature.
The observance is both a warning and an invitation. Scientists warn that species are disappearing far faster than natural rates, yet the day also highlights real progress: rewilding projects, protected areas, seed banks, and community conservation efforts proving that decline is not inevitable. It asks everyone, from governments to gardeners, to consider their part in keeping the living world rich and resilient.
When is International Day for Biological Diversity?
| Year | Date | Weekday |
|---|---|---|
| 2026 | May 22, 2026 | Friday |
| 2027 | May 22, 2027 | Saturday |
| 2028 | May 22, 2028 | Monday |
| 2029 | May 22, 2029 | Tuesday |
| 2030 | May 22, 2030 | Wednesday |
History of International Day for Biological Diversity
The United Nations General Assembly first declared December 29, the date the Convention on Biological Diversity entered into force, as International Day for Biological Diversity in 1993. Practical concerns changed that: late December falls during holidays and freezing northern winters, making outdoor events difficult. In December 2000 the Assembly moved the observance to May 22, commemorating the day the convention's text was adopted in Nairobi in 1992. Since then the day has grown into a global platform for launching conservation initiatives, publishing biodiversity reports, and mobilizing campaigns. It now anchors international efforts such as the Kunming-Montreal Global Biodiversity Framework agreed in 2022.
How to Celebrate International Day for Biological Diversity
- Plant native flowers, shrubs, or a small pollinator garden to support local insects and birds.
- Join a guided nature walk, bioblitz, or citizen-science survey and log the species you find.
- Watch a documentary about coral reefs, rainforests, or rewilding, then share one surprising fact.
- Choose certified sustainable or wildlife-friendly products, from shade-grown coffee to FSC-labeled paper.
- Support a conservation organization protecting a habitat or species you care about.
Frequently Asked Questions
- When is International Day for Biological Diversity?
- It is observed every year on May 22, the anniversary of the adoption of the Convention on Biological Diversity in Nairobi in 1992.
- Is International Day for Biological Diversity a public holiday?
- No. It is a United Nations observance, not a public holiday. Schools and workplaces run as normal, though many institutions hold environmental programs around the date.
- How do people observe International Day for Biological Diversity?
- People observe the day with tree plantings, nature walks, species surveys, school lessons, and awareness campaigns. Governments and conservation groups release reports and announce new protected areas or restoration projects.
- Why did the date change from December to May?
- The UN moved the observance from December 29 to May 22 in 2000, because the original date fell during winter holidays and made public events difficult to organize.