Today, 8 December 2011 is Karthigai Deepam. Karthigai Deepam is celebrated on Krittika or Karthigai Nakshatra in Karthigai Month in Tamil Nadu. It is celebrated in large scale at Thiruvannamalai Arunachala Temple. The festival attracts more than a million devotees to the temple.
Karthigai Deepam is also celebrated as Vishnu Deepam and Yanai Pandigai in some other sects of people in Tamil Nadu and Kerala.