World Obesity Day takes place on 4 March 2026, bringing together everyone who is affected by overweight and obesity – all 8 billion of us - with a particular focus on our most vulnerable communities: children. The reason is simple: childhood obesity is rising rapidly, with the prevalence among school-aged children increasing from 4% in 1975 to almost 20% in 2022. The rise is sharpest in low- and middle-income countries. Obesity in childhood often continues into adulthood, inc