Hi,
I have about this day but never got to know about it..
Went to find out, got to know about this auspicious day called
"Masi Magam" and yea, so here I am, to share it with you..
Before that, would like to thank the author of
www.hindu-blog.com, as I got most of the materials from there.. Thanks!
(Pictures of Masi Magam included below for your viewing pleasure)Masi Magam or Masi Maham, is an auspicious day in the Tamil month of Masi (around Februray-March).
In 2010, the date of Masi Magam was February 28. It is an important day and annual festival for Tamils around the world. Makam, Mahm or Makam, is one among th 27-stars (Nakshatras) in the Hindu astrological system. One of the major rituals on the day, is the holy 'bath' of Temple's Urchava Murthy(Processional Dieties) in a sea, pond or a lake.
They are carried in a grand occassion to sea shores, rivers or ponds. Poojas and rituals are held here and thousands of people gather to witness the auspicious event.
It is believed that those who take bath in the seas or rivers or ponds on the Masi Magam will attain Great Punya.
Once in twelve years, Masi Magam attains special significance; it is then known as
Maha Maham.
The reason for observing Masi Magam varies from region to region and sometimes even from temple to temple.
The day is of great significance in
Pondicherry, Kumbakonam, Srirangam(India) and in numerous other shrines associated with Lord Vishnu, Shiva and Shakti in South India and in those regions around the world which has the Tamil speaking population.
In Singapore, this festival is celebrated at Sri Manmatha Kauneshwarar(Sivan) Temple. The water body used is the Kallang River nearby.
In other Temples, like the Sri Thendayuthapani Temple(Tank Road), special prayers are done.
In Malaysia, Masi Magam Theppe Thiruvila (floating festival) is special. It takes place in Penang and is the second largest festival after Thaipusam, attracting a crowd of more than 50,000. The festival is celebrated in honour of Sri Singamuga Kaliamman, theonly Temple having a floatable chariot for the festival. 
