Celebrated on 21 March annually, World Down Syndrome Day (WDSD) is a global event to raise awareness and exemplify the abilities of persons with Down syndrome. The 21st day of March was selected to signify the uniqueness of the triplication (trisomy) of the 21st chromosome which causes Down syndrome.
On this day, we encourage everyone to wear odd socks to show their support for the Down syndrome community. Odd socks were chosen as a symbol for WDSD because chromosomes are shaped like socks, and those with Down syndrome have an extra chromosome.
In Singapore, WDSD is celebrated with a Community Walk and a Family Carnival.