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World Down Syndrome Day

March 21

World Down Syndrome Day

An awareness observance on March 21 raising global awareness of Down syndrome, promoting inclusion, human rights, and full participation of people with Down syndrome in society.

Yearly Date
March 21
Category
Awareness
Founding Entity

Down Syndrome International

First Observed
2006
Origin

International Body Recognition

Down Syndrome International (DSi) established the observance, first informally held in 2006 with collaboration from the Brazilian Federation of Associations of Down Syndrome. UN General Assembly resolution A/RES/66/149, adopted December 19, 2011 and proposed by Brazil, officially designated March 21 as World Down Syndrome Day from 2012.

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Holiday Calendar
Last updated February 26, 2026 by the Holiday Calendar Team
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Introduction

World Down Syndrome Day on March 21 is a day to spread awareness and celebrate the lives of those with Down syndrome. It was first established in 2006 after the United Nations General Assembly declared it an official holiday. This year marks the 15th anniversary of World Down Syndrome Day, which just goes to show how far we've come since then! Let's take this opportunity to honor and recognize people living with Down syndrome for their unique strengths, abilities, and contributions they make every day.

World Down Syndrome Day Timeline

1866
Down Syndrome Identified
English physician John Langdon Down first described Down syndrome as a distinct category of mental disability.
1959
Cause of Down Syndrome Discovered
Scientists involved in chromosome research discover that Down syndrome is caused by an extra chromosome.
2005
World Down Syndrome Day Established
The Down Syndrome International organization proclaims the 21st of March as World Down Syndrome Day.
2011
Recognized by United Nations
The United Nations officially recognizes World Down Syndrome Day to raise public awareness and advocate for rights, inclusion, and well-being of people with Down syndrome.
2012
First Official Celebration
The first official global celebration of World Down Syndrome Day takes place, following United Nations recognition.
2020
Change of Events Due to COVID-19
Events honoring World Down Syndrome day worldwide were heavily impacted due to COVID-19. Many of such events were conducted virtually.

How to Celebrate World Down Syndrome Day

1

Attend a local event

Find a local event in your area to celebrate World Down Syndrome Day and join in the fun! From parades to movie screenings, there are plenty of ways to get involved and show your support.

2

Organize a fundraiser

Organize a fundraiser or donation drive for an organization that supports people with Down Syndrome. Consider hosting a bake sale, car wash, or online fundraiser to help raise money for this cause.

3

Create awareness on social media

Spread awareness about World Down Syndrome Day by creating posts on your social networks. You can share facts, stories, or photos related to the day and use the hashtag #WorldDownSyndromeDay to join the conversation.

4

Volunteer at a local charity

Take some time to volunteer with an organization that works with people with Down Syndrome. Whether you are helping out at a charity event or tutoring someone, your time and effort will make a difference.

5

Watch an inspiring movie

Take the time to watch an inspiring movie about individuals living with Down Syndrome such as “The Peanut Butter Falcon” or “Life, Animated”. These movies are sure to put a smile on your face while showing the strength and beauty of those living with this condition.

Why World Down Syndrome Day is Important

A

Raising awareness

World Down Syndrome Day is a great way to spread awareness about the disorder and the individuals who live with it. It helps to create an understanding of what Down syndrome is and how it affects those living with it, as well as advocate for better education, healthcare and social inclusion for these individuals.

B

Advocating for inclusion

World Down Syndrome Day helps to promote equality and inclusion by highlighting the fact that everyone is valuable. By recognizing and celebrating the accomplishments of individuals with Down syndrome, we can show our support and create an environment where everyone is accepted and included in society.

C

Creating understanding

World Down Syndrome Day encourages people to learn more about Down syndrome, understand its complexities, and dispel any misconceptions they may have. It also serves as a platform for sharing stories of individuals living with Down syndrome, which can help foster greater empathy and understanding among society.

Holiday Dates

Year Date Day
2023 Tuesday
2024 Thursday
2025 Friday
2026 Saturday
2027 Sunday