Trisomy 13 Awareness Day, also known as Patau Syndrome Awareness Day, is observed worldwide every March 13. This day was established to highlight Patau syndrome, a rare genetic condition characterized by multiple organ defects and a very poor prognosis. The syndrome, named after geneticist Klaus Patau, occurs when there is an extra copy of chromosome 13, leading to severe developmental issues. Events on this day aim to educate the public about Trisomy 13 and support families affected by the syndrome. Activities include sharing information on social media using hashtags like #Trisomy13AwarenessDay and #PatauSyndromeAwarenessDay, as well as donating to organizations that assist children with Patau syndrome and their families. March is also recognized as National Trisomy Awareness Month, further emphasizing the need for education and support surrounding this condition.