World Obesity Day
Visit the World Obesity Day website
4 March 2026
This year's World Obesity Day campaign calls on eight billion of us to help change the story on obesity.
By 2035, half of the world's population - around 4 billion people - are expected to be living with overweight or obesity.
This is not just an adult issue. Childhood obesity is rising rapidly, with rates among school-aged children increasing almost fivefold since 1975, particularly in low- and middle-income countries.
Taking action on obesity is a critical step in reducing the global burden of other chronic diseases including diabetes, heart disease and cancer.
