There is a great story behind this famous festival. Heranyakasip – a demon king get a boon of immortality from lord Brama after a hard worship. He gets the charm that he would not be able to murder by Men or Animal, in Day or Night, in house or Out of house, on Land or Sky, from astra or shstra.
So he thinks that he would never die. After that he filled with ego and stopped the worship of Hari or Vishnu and tells people to accept him as god by starting worship to him. If someone refuses to worship him he tortured badly, even kill them.
Prahalad – son of hiranyakasipu, was the prayer of Lord Vishnu
Later Known As "Bakta – Prahalad" . Hiranyakasipu annoyed with him started to torture him .he drop him from a highly hill but prahald not get scratch even. He tries to burn him with Holica. She was sister of Hiranyakasipu and get booned to be never burned in fire. He sits with prahalad in fire but Prahalad comes securely from the fire and Holica get burned and die.
The "Holi" festival is celebrated on this day. Finally when he was going to kill prahald which was tied-up with a pillar, by his sword, suddenly Lord Vishnu Appear from That Pillar in the getup of Narasimha- half lion and half men. He put-up hiranyakasipu and lay him on both Knees of his Lags. Then murdered him by piney Nells of both hands.
So this was the Narasimha incarnation of Lord Vishnu and celebrated as Narasimha Jayanthi.
Narasimha Jayanthi comes on the fourteenth day in bright fortnight of Vaishakha month (Vaishakha Sukla Chaturdashi) according to Hindu month calendar. It celebrated up-to best level in NavaNarasimha Area in Andhra Pradesh and far-nearer as well.
The Famous Temples :–
Simhachalam Lakshmi Narasimha Swamy Temple, Yadagirigutta Lakshmi Narasimha Swamy Temple, Ahobilam Narasimha Swamy Temple, Dharmapuri Yoga Narasimha Swamy Temple, and Mangalagiri Paanakala Lakshmi Narasimha Swamy Temples are the most visited temples by many people on this day.
People fast on this day, and goes to the temple of Lord Vishnu and specially to Narasimha temples for worship. Special Pooja’s organized in the temples of Lord Vishnu and Narasimha all over the world.
The Date of Famous Narasimha Jayanthi Festival This year is: 26 May 2010.