World Down Syndrome Day, on 21 March, is 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 2025, we call on all Governments to Improve Our Support Systems
This is the message that we are asking supporters to share on and around World Down Syndrome Day, 21 March 2025.
Learn moreResources hub
We want to support everyone to make the most of World Down Syndrome Day.
The team at Down Syndrome International have kindly produced resources to give you the help you need.
The Lots Of Socks campaign
Believe it or not, socks get people talking!
Get noticed and start a conversation about #WorldDownSyndromeDay.
Get involved!
Every year we encourage people with Down syndrome, families, advocates, professionals and organisations to observe World Down Syndrome Day with your own activities.
Here are a few ideas to get you started.
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?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 including guides for advocacy, schools and organisations, posters, templates and lots more 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.
