Vaikasi Visakam is celebrated on the day when the asterism Visakam, in the month of Vaikasi - the 2nd month of the Tamil Calendar
. Vaikasi Visakam is observed as the birthday of Lord Muruga
. The festival falls between the mid-May and mid-June of the Gregorian calendar.
The festival is much popular in Muruga temples all over Tamil Nadu
and is held with much religious fervor.