an image of different brightly colored and patterned socks with the phrase "rock your socks" in the center

Wearing mismatched socks is meant to call attention to World Down Syndrome Day, which celebrates the lives of people with Down syndrome and their positive contributions to their communities. 

In honor of the day, people around the world are sharing photos and videos of their mismatched socks using the hashtag #RockYourSocks. 

The day is celebrated on March 21 because the date symbolizes the 3 copies of the 21st chromosome, the genetic difference which leads to Down syndrome