How Karthigai Deepam Is Celebrated
Karthigai Deepam is celebrated at two scales at once: quietly, at home, with a few lit lamps at the doorway; and grandly, at Tiruvannamalai, where the entire town gathers on the day of the Maha Deepam. Both are essential to the festival - the household flame and the mountain flame answer each other.
Preparing the home
Preparation begins several days ahead. Homes are thoroughly cleaned, floors washed, puja rooms wiped and rearranged, and the front step scrubbed for the fresh kolam that will be drawn each morning. Mango-leaf toranams (door garlands) are hung across the main entrance. Silver and brass lamps are polished. New clothes are bought for the family.
The lamps themselves are traditional shapes: the small clay agal vilakku for arranging in rows, the tall standing kuthu vilakku for the puja room, the Gajalakshmi or yanai vilakku (elephant-shaped) that parents gift to a newly-married daughter. Sesame oil (nallennai) or pure ghee is preferred over refined oil - both burn cleanly and are considered auspicious. Cotton wicks are hand-rolled the day before.
The three days
In Tamil Nadu, Karthigai Deepam is observed over three days. The exact rhythm differs slightly by tradition and by region, but a common pattern is:
Day 1 - Bharani Deepam
The day before the main Deepam. At Tiruvannamalai, a single lamp is lit inside the sanctum of the Arunachaleswarar Temple before dawn. In homes, a smaller number of lamps (often five) are lit at dusk in the puja room, and offerings of sweets are made. Kolam patterns become more elaborate.
Day 2 - Karthigai Deepam (the main day)
This is the day when the Krittika nakshatra coincides with Pournami (full moon). The morning begins with a ritual oil bath and fresh clothes. The puja room is arranged with fruit, flowers, betel leaves, and the freshly-cooked naivedyam - typically pori urundai, nei appam, and sakkarai pongal.
From dusk onward, lamps are lit progressively throughout the home. First the central lamp in the puja room; then lamps at each door and window; then the rows of agal vilakku on the front steps and along the balcony. In many families a lamp is placed inside the rice container and the salt box, as a prayer for the year's provisions. Children light sparklers and small crackers. Neighbours visit; sweets are exchanged.
The tradition is to keep the lamps burning until they exhaust the oil naturally, never to blow them out.
Day 3 - the day after
A smaller version of Day 2. Fewer lamps are lit, but the puja is repeated in miniature. Many families take this day to visit relatives and to visit the local temple.
The Maha Deepam at Tiruvannamalai
The single most famous scene of Karthigai Deepam belongs to the town of Tiruvannamalai, at the foot of the sacred hill of Arunachala. The Arunachaleswarar Temple hosts a ten-day Brahmotsavam festival that culminates on Karthigai Deepam day. Flag-hoisting begins on Uttiradam. Over the next nine days the temple deities are taken in procession through the town on a different vahanam each day - silver bull, golden lion, elephant, horse, and so on - drawing enormous crowds.
On the tenth day, five lamps are lit inside the sanctum in the early morning: the Bharani Deepam. That flame is then carried, in a slow procession, up the Arunachala hill to a great copper cauldron waiting at the summit. The cauldron is roughly five feet in diameter, filled with several tonnes of pure ghee (recent years have used more than 3,500 kilograms), together with camphor and a stitched wick of Ghada cloth measured in hundreds of metres.
At sunset, as the full moon rises on the eastern side of the hill, the priest lights the flame. The great fire - the Maha Deepam - leaps up. From the town below, and from villages as far as thirty-five kilometres away, people see the flame at the same instant and cry out “Annamalaiyaarukku Arohara!” - "praise be to the Lord of Annamalai." The Maha Deepam is kept burning for several days.
Girivalam - the circumambulation of the hill
On the same day, and on every Pournami of the year, devotees perform Girivalam: a barefoot circumambulation of the base of the Arunachala hill. The full path is approximately fourteen kilometres, passing eight lingams representing the eight cardinal directions. On Karthigai Deepam day the crowds are the largest of the year; hundreds of thousands of pilgrims walk through the night. The town of Tiruvannamalai is transformed into a moving river of lamps, songs, and quiet prayer.
Regional variations
While Tamil Nadu is the heart of the festival, Karthigai Deepam is also observed in Kerala (as Trikkarthika), in the Tamil-speaking regions of Karnataka and Andhra Pradesh, and across the Tamil diaspora - Sri Lanka, Malaysia, Singapore, Mauritius, South Africa, the Gulf, the UK, USA, Canada, and Australia. Every diaspora community shapes the celebration a little differently, but the same essential elements - the clean home, the lit lamp, the sweets, the family - travel wherever Tamil families go.
A final word on the flame
The Karthigai Deepam lamp is never lit for show. Whether it is a single agal vilakku on a doorstep in Chennai or the great Maha Deepam on Arunachala, the gesture is the same: a small human offering of attention, held up against a much larger dark. That is why the festival has lasted for more than two thousand years, and why it is likely to last for as long as anyone is willing to light a lamp.