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How Many Days Until World Soil Day?
Saturday, December 5, 2026
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About World Soil Day
World Soil Day, observed every year on December 5, focuses attention on the thin, living layer beneath our feet that makes nearly all terrestrial food production possible. Soil hosts a quarter of the planet's biodiversity, filters water, stores carbon, and, when healthy, grows the crops that feed the world. Yet soil degrades silently: erosion, salinization, compaction, pollution, and loss of organic matter undermine fertility faster than nature can rebuild it.
The Food and Agriculture Organization of the United Nations hosts the observance, which the UN General Assembly formally adopted in 2013 following a proposal from Thailand. December 5 honors the birthday of King Bhumibol Adulyadej of Thailand, a longtime advocate of soil management.
Each year the day carries a theme, from halting erosion to measuring and managing soil salinity. The observance urges farmers, gardeners, policymakers, and consumers to treat soil as a finite resource that renews far more slowly than we use it.
History of World Soil Day
The idea for World Soil Day grew out of the International Union of Soil Sciences, which proposed the observance in 2002 to raise the public profile of soil conservation. Thailand's royal family, and King Bhumibol Adulyadej in particular, had long promoted sustainable soil and water management, so the December 5 date was chosen to mark the king's birthday. The Food and Agriculture Organization endorsed the campaign and shepherded it through the United Nations system, and in December 2013 the UN General Assembly formally designated December 5 as World Soil Day, with 2015, the International Year of Soils, marking the first full celebration. Since then the FAO has coordinated annual themes, the Global Soil Partnership has expanded, and national campaigns have used the day to promote practices such as cover cropping, reduced tillage, and composting that rebuild organic matter and slow erosion.
2026 vs 2027 dates
Frequently Asked Questions
- When is World Soil Day?
- World Soil Day is marked every year on December 5, a fixed date chosen to honor the birthday of Thailand's King Bhumibol Adulyadej, an advocate of soil conservation.
- Is World Soil Day a public holiday?
- No. World Soil Day is a United Nations and FAO observance, not a public holiday. Offices and schools operate normally, with the day marked by educational events.
- How do people celebrate World Soil Day?
- People observe the day by learning about soil health, starting compost, planting trees or cover crops, and joining FAO-hosted events and webinars.
- Why does soil matter so much?
- Soil grows about 95 percent of our food, stores vast amounts of carbon, filters water, and supports a quarter of known biodiversity, yet it can take centuries to form a single inch of new topsoil.