What is World Down Syndrome Day?

World Down Syndrome Day (WDSD), 21 March, is a global awareness day which has been officially observed by the United Nations since 2012.

The date for WDSD being the 21st day of the 3rd month, was selected to signify the uniqueness of the triplication (trisomy) of the 21st chromosome which causes Down syndrome.


Join us to promote full inclusion on World Down Syndrome Day.

On this day, people with Down syndrome and those who live and work with them throughout the world organise and participate in activities and events to raise public awareness and create a single global voice advocating for the rights, inclusion and well being of people with Down syndrome.

World Down Syndrome Day


Here's what we do for WDSD...

An annual WDSD Conference at United Nations HQ in New York, United States.

New York 2021

An annual event led by people with Down syndrome at the UN in Geneva, Switzerland.

Geneva 2021

A call to action each year, based on a theme and with resources, to help you advocate for the rights of people with Down syndrome on 21 March.

CONNECT 2021

A 21 day campaign helping supporters to learn about, advocate for and support people with Down syndrome.

21 day challenge

A dedicated blog covering all of the activities associated with WDSD.

WDSD blog

Social media icons

We run dedicated WDSD social media accounts.

Find WDSD on:

Facebook Twitter Instagram 

Use the hashtag #WorldDownSyndromeDay

WDSD website

We manage the WDSD website.

WDSD website

We coordinate the #LotsOfSocks campaign. People all over the world wear 'lots of socks' to draw attention to 21 March. You can even buy official socks from the shop!

#LotsOfSocks website

Each year the voice of people with Down syndrome, and those who live and work with them, grows louder.

Join in with us to create a single global voice for advocating for the rights, inclusion and well being of people with Down syndrome on 21 March.

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