Narasimha Chaturdashi is the appearance day of Lord Narasimha, the half-lion half-man incarnation of Supreme Lord Krishna, who appeared to protect His devotee Prahlada from his demoniac father Hiranyakashipu. This festival is of great significance to all vaisnavas. Lord Nrsimhadev removes all obstacles on the path of devotional service. Devotees who pray to Him are always protected from all kinds of calamities. For more details, please visit - http://www.krishna.com/half-man-half-lion-incarnation-appearance-day-nrsimhadeva.