Narasimha Jayanthi which is celebrated on May 16th 2011
This day signifies the appearance of Lord Narasimha on the planet. Lord Narasimha is the fourth and the greatest incarnation of Lord Vishnu. He is believed to have appeared to protect his devotee, Prahlada, from his father Hiranyakashyapu .
If you listen to the song ” Narashima Nembo davana” posted on youtube, there is a paragraph which explains how Lord Narashima came from the pillar. Hiranyakashyapu pointed out at a pillar in his palace and asked Prahalada whether Lord Vishnu was present in it pillar. Prahalada who was a great devotee said yes. Next, you know Hiranyakashyapu uses his Gadha and broke open the pillar and there emerged our Lord Narasimha who than slained the Hiranyakashyapu using his sharp paws.
The day signifies the triumph of good over evil and the eagerness of the lord to protect his devotees from evil.
Here is the link for the song Narashima Nembo Devana on Lord Shri Lakshmi Narashima