21 March is World Down Syndrome Day
A global awareness day which has been officially observed by the United Nations since 2012.
Find out why this day is so important…
About World Down Syndrome Day
For World Down Syndrome Day 2026, we are calling on everyone around the world to stand
Together Against Loneliness
This is what we are asking supporters to talk about on and around World Down Syndrome Day, 21 March 2026.
Learn moreWDSD at the United Nations in New York!
Down Syndrome International will be hosting the 15th World Down Syndrome Day Conference at the United Nations in New York.
Self-advocates and other experts will speak up about the problem of loneliness and what needs to be improved.
Visit the Down Syndrome International website to learn more about the work of this global network of people with Down syndrome and their families:
The Lots Of Socks campaign
Believe it or not, socks get people talking!
Get noticed and start a conversation about #WorldDownSyndromeDay.
What is Down syndrome?
Down syndrome (or Trisomy 21) is a naturally occurring chromosomal arrangement that has always been a part of the human condition.
The best people to answer many questions about Down syndrome are people with Down syndrome, so over to them…
What is Down syndrome?There are all sorts of ways that you can support World Down Syndrome Day
Take action
Join us! Sign up to hear from the World Down Syndrome Day team about how you can get involved.
You will also get access to our FREE resources to help you mark this important day.
Together we will create a single global voice advocating for the rights, inclusion and well being of people with Down syndrome.
