Karthikai Deepam
Karthikai Deepam or Karthikai vilakkidu is a Hindu and Tamil, Festival of Lights. The festival is observed in most Hindu homes and every temple, and falls in the month of Kārttikai (mid-November to mid-December) as per Tamil calendar. This occurs on the day when the moon is in conjunction with the constellation Karthigai (Pleiades) and pournami. This constellation appears as a group of six stars in the firmament in the shape of a pendant from the ear.
The story of six stars
Many legends and lyrical poetry have grown round this star. The six stars are considered in Indian mythology as the six celestial nymphs who reared the six babies in the saravana tank which later were joined together to form the six faced Muruga. He is therefore called Karthikeya, the incarnation of lord Shiva as his second son after lord Ganesha. Stories tells lord shiva created Muruga from his 3rd eye of six primary faces (Tatpurusam, Aghoram, Sadyojatam, Vamadevam, Eesanam, Adhomukam). Stories tells the six forms made into six child and each of them brought up by the six Karthigai nymphs and later merged into one by his mother Parvati.