World Down Syndrome Day - The United Nations

Down Syndrome

Down syndrome occurs when an individual has an extra partial (or whole) copy of chromosome 21. It is not yet know why this syndrome occurs, but Down syndrome has always been a part of the human condition. It exists in all regions across the globe and commonly results in variable effects on learning styles, physical characteristics and health.

Adequate access to health care, to early intervention programmes, and to inclusive education, as well as appropriate research, are vital to the growth and development of the individual.

In December 2011, the General Assembly declared 21 March as World Down Syndrome Day (A/RES/66/149). The General Assembly decided, with effect from 2012, to observe World Down Syndrome Day on 21 March each year. In order to raise public awareness of Down syndrome, the General Assembly invites all Member States, relevant organizations of the United Nations system and other international organizations, as well as civil society, including non-governmental organizations and the private sector, to observe World Down Syndrome Day in an appropriate manner.

Background

The estimated incidence of Down syndrome is between 1 in 1,000 to 1 in 1,100 live births worldwide. Each year, approximately 3,000 to 5,000 children are born with this chromosome disorder.

The quality of life of people with Down syndrome can be improved by meeting their health care needs, including regular check-ups with health professionals to monitor mental and physical condition and to provide timely intervention be it physiotherapy, occupational therapy, speech therapy, counselling or special education. Individuals with Down syndrome can achieve optimal quality of life through parental care and support, medical guidance, and community based support systems such as inclusive education at all levels. This facilitates their participation in mainstream society and the fulfillment of their personal potential.

Together against loneliness

The 2026 World Down Syndrome Day theme, “Together Against Loneliness,” focuses on raising awareness of how loneliness disproportionately affects people with Down syndrome and other intellectual disabilities, as well as their families.

It highlights that loneliness is not just an emotional feeling but a serious health issue that can lead to anxiety, depression, and physical harm, often linked to social exclusion and stigma.

The campaign calls for real inclusion in schools, workplaces, and communities, emphasizing that being present does not equate to being included or truly connected. It stresses that everyone - individuals, families, organizations, schools, employers, and governments - has a role in creating welcoming spaces and meaningful relationships to help people feel they belong.

Ultimately, the theme frames loneliness as a human rights issue, urging collective action to turn the UN Convention on the Rights of Persons with Disabilities into concrete change that ends isolation and promotes full participation in society.

Events

23 March 2026, the Down Syndrome International network will host the 15th World Down Syndrome Day Conference at the United Nations headquarters in New York.

19 and 21 March 2026, there will be a number of events at the United Nations in Geneva to mark World Down Syndrome Day.