"World Down Syndrome Day is March 21. It is a day to celebrate people with Down syndrome and support inclusion. The date 3/21 stands for the extra copy of chromosome 21 that causes Down syndrome. Families, schools, and communities can all take part."
World Down Syndrome Day (WDSD) is celebrated every March 21. The Down Syndrome Diagnosis Network (DSDN) offers families free tools to join in: printable coloring pages, customizable yard signs, downloadable flyers, and children's book lists. Families can also wear mismatched socks, buy DSDN shirts (15% off with code WDSD2026), and share videos on social media. A Facebook Live event on March 21 at 7pm Eastern includes retreat scholarship announcements and a free registration giveaway.
What is World Down Syndrome Day (3/21)?
World Down Syndrome Day (WDSD) is a global awareness day celebrated each year on March 21. This date signifies the uniqueness of the triplication (trisomy) of the 21st chromosome, which causes Down syndrome. On this day, individuals and organizations worldwide come together to celebrate the lives of people with Down syndrome, promote inclusion, and advocate for their rights and well-being.
How can you show your support on WDSD?
There are many ways you can participate in World Down Syndrome Day! From showing off colorful socks, using your own voice and platform to advocate, and participating in local events, you can help create a more accepting and inclusive world. Here are a few ways that you can join DSDN on that day.
Wear Your Support
Check out our World Down Syndrome Day shirts in the DSDN merch shop! Available in several styles and colors. Kids options available too!
Get 15% off with the code WDSD2026 through March 21.
Rock Your Socks
What's the easiest way to honor 3.21? Ready to go SOCKS and swag! You'll often see people sporting their mismatched socks on WDSD to spark conversations about Down syndrome.
Learn more here.
Display Your Support
Customize a yard sign to proudly celebrate your child leading up to and on World Down Syndrome Day! The process is simple and completely free to use (a free Canva account is required).
Learn more here.
Join our social media
celebration on March 21!
Be on the lookout for our compilation video on March 21 that showcases our amazing Rockin' community!
BONUS! Tag DSDN on Instagram, Facebook, and TikTok so we can share your content on WDSD.
Other WDSD Resources:
From DSDN's Online Resource Library
Book List - Children's Books About Down Syndrome, Inclusion, Celebrating Difference, and More
Book List - Children's Books About Down Syndrome, Inclusion, Celebrating Difference, and More
"Rock Your Socks" coloring page!
"Rock Your Socks" coloring page!
"Rock Your Socks" flyer to download or customize
"Rock Your Socks" flyer to download or customize
"My Classmate has Down syndrome - Let's Celebrate" template
"My Classmate has Down syndrome - Let's Celebrate" template
View all of the resources in DSDN's Online Resource Library 0r Biblioteca de Recursos
View all of the resources in DSDN's Online Resource Library 0r Biblioteca de Recursos
More DSDN and WDSD Apparel and Gear
Rockin' Mom™, Rockin' Dad™ and Rockin' It™ apparel
Rockin' Mom™, Rockin' Dad™ and Rockin' It™ apparel
DSDN Goodies Shop
DSDN Goodies Shop
DSDN Share & Shop Group featuring goods and services from Rockin' families
DSDN Share & Shop Group featuring goods and services from Rockin' families
🌟 Join us live on our Facebook page!
Join us for a special Facebook Live on 3.21—World Down Syndrome Day!—at 7pm Eastern on our Facebook page. We'll announce the winners of the Rockin' Retreat scholarships and you can enter to win a FREE retreat registration!
Why is 3/21 significant to DSDN?
In addition to spreading awareness and advocating on WDSD, the Down Syndrome Diagnosis Network (DSDN) was founded on World Down Syndrome Day in 2014 with a mission to support families receiving a Down syndrome diagnosis. Through our community-driven approach, we connect expectant and new parents — and the medical professionals who serve them — with resources, information, and a network of support. From personalized online groups to our annual Rockin’ Mom® and Rockin’ Dad™ Retreats, DSDN fosters a community where parents can find understanding, connection, and empowerment.
Learn more about DSDN
Together we can make a lasting impact! Your generosity allows DSDN to continue supporting families from diagnosis and beyond.
Visit the DSDN website to download free resources like the Rock Your Socks coloring page or classroom template, and mark your calendar for the Facebook Live on March 21 at 7pm Eastern.
