World Leprosy Day is celebrated on January 30, 2017. World Leprosy Day is observed internationally on January 30 or its nearest Sunday to increase the public awareness of the Leprosy or Hansen's Disease. This day was chosen in commemoration of the death of Gandhi, the leader of India who understood the importance of leprosy.
Leprosy is one of the oldest recorded diseases in the world. It is an infectious chronic disease that targets the nervous system, especially the nerves in the cooler parts of the body - the hands, feet, and face. (With material from: Wikipedia)