Narasimha Chaturdashi, also known as Narasimha Jayanti, is the appearance day or birthday of Lord Narasimha, the half-Lion and half-man incarnation of Lord Vishnu.
Narasimha Chaturdashi 2018 date is April 28. Narasimha Chaturdasi is observed on Vaisakha shukla Chaturdashi or fourteenth day in bright half of Vaisakha month.
Narasimha Chaturdashi festival is of great significance in Vishnu temples and for Vaishnava sect of people. They observe fast during the festival and special pujas are performed in the temples dedicated to Lord Narasimha. In ISKCON Temples all over the world, it is celebrated with pomp and gaiety.
Legend of Narasimha Chaturdashi and Narasimha Avatar:
The main purpose of appearance or incarnation of avatar of Narasimha swamy was to restore peace in the world by slaying the demon Hiranyakashapa. Hiranyakashapu got a boon from Lord Brahma that neither man nor animal can kill him neither in the house nor out of the house and neither during the day time nor night.
As per his boon Vishnu appeared as Narasimha swamy (Half-animal and half-man) to kill the demon in the evening (sandhya kaal) at the door of his house. Prahlada was the son of Hiranyakashapu and the devotee of Lord Vishnu. Hiranyakashapu wanted to kill his son because of his devotion to Lord Vishnu.