Karthigai Deepam: Tamil Nadu's Festival of Lamps

There is a particular evening in the Tamil month of Karthigai when streets across Tamil Nadu begin to glow. As the sun sets, families step out with trays of small clay lamps and line them up on doorsteps, walls, window ledges and kolams. One by one the wicks are lit, and the whole neighbourhood turns golden. This is Karthigai Deepam, the Tamil festival of lamps.

It is one of the most loved festivals in Tamil homes, and also one of the most peaceful. There is no rush, no noise needed. Just light, prayer and family.

When is Karthigai Deepam?

Karthigai is the Tamil month that usually falls between mid-November and mid-December. The festival is celebrated on the day when the Karthigai star (nakshatram) is in the sky during this month, which usually falls on or close to the full moon. Because it follows the Tamil calendar, the date in the English calendar changes from year to year, so families check the panchangam or a Tamil calendar to know the exact day.

The story behind the light

The most widely told story behind Karthigai Deepam is connected with Lord Shiva. According to the legend, Brahma and Vishnu once argued about which of them was greater. Shiva appeared before them as an endless column of fire and asked them to find its beginning and its end. Vishnu searched downward and Brahma flew upward, but neither could find the limit of the flame. The festival celebrates Shiva as this infinite light, and the lamps are a reminder of that story.

The festival is also associated with Lord Murugan in many homes and temples, since the six Karthigai maidens are said to have cared for him as a child. Like many Tamil festivals, it brings several threads of tradition together, and different families emphasise different parts.

The Maha Deepam at Tiruvannamalai

The most famous Karthigai Deepam celebration takes place in the temple town of Tiruvannamalai. Here, the hill of Annamalai (also called Arunachala) is itself revered as a form of Shiva, and the great Arunachaleswarar temple stands at its foot.

On the evening of the festival, a huge lamp known as the Maha Deepam is lit at the top of the Annamalai hill. The flame can be seen from far around, and the moment it is lit is greeted with devotional chants by the large crowds gathered in the town. The Deepam continues to burn on the hilltop for several days after the festival.

Many devotees also walk around the hill on foot, a practice called girivalam. It is popular on full moon days throughout the year and especially during the Deepam festival. If you plan to visit during this time, expect very large crowds, book stays early, carry water and follow the instructions of temple staff and police.

How families celebrate at home

The agal vilakku

The heart of the festival at home is the agal vilakku, the small, shallow clay lamp filled with oil or ghee and a cotton wick. Many families buy new agal vilakkus every year from local potters, while others clean and reuse their old ones. Brass lamps, including the tall kuthuvilakku, are also polished and lit.

In the evening, after a prayer at the home altar, the lamps are lit and placed in rows: along the front steps, on the compound wall, beside the tulsi plant, at the windows and around the kolam. Children love helping with this part, carefully carrying lit lamps from one spot to another.

Kolam and decorations

The kolam at the doorway is often drawn with special care, sometimes with spaces left for lamps to be placed right inside the design. A kolam lit by a ring of small flames is one of the most beautiful sights of the Tamil year.

Festival food

Food is part of every Tamil festival, and Karthigai has its favourites. The best known is pori urundai, sweet balls made of puffed rice and jaggery. Many homes also make appam and adai, and simple sweets offered during the evening prayer. Recipes differ from home to home, and every grandmother has her own version.

Little customs worth knowing

• Lamps for several days. In many homes, lamps are lit not just on the main day but on the days around it as well.
• Temple visits. Shiva and Murugan temples are especially busy, and many temples light lamps all around their towers and corridors.
• Light over noise. The spirit of the day is calm. A row of lamps says more than any loud celebration.

A few safety reminders

Lamps are beautiful, but fire needs care, especially with children and pets around:

• Keep lamps away from curtains, dry leaves and loose clothing, especially sarees and dupattas.
• Place lamps on stable, flat surfaces where they will not be knocked over.
• Do not leave lamps burning unattended late at night.
• Keep a bucket of water or sand nearby if you light many lamps outdoors.

Celebrating together, near or far

If you live away from home, Karthigai Deepam is a simple festival to celebrate wherever you are. Even a single agal vilakku lit at your doorstep carries the feeling of home. Take a photo, call your family when they light their lamps, and share the moment.

On the TNChatZone app, you can share Deepam photos and greetings with people from your own district in rooms such as Vellore or Chennai. If you would like to read about another favourite festival, see our guide to the four days of Pongal, or test yourself with the festivals and food quiz.

Wishing you and your family a bright and peaceful Karthigai Deepam.