A few weeks after Deepavali, Tamil homes bring out the clay lamps again. On the evening of Karthigai Deepam, rows of small agal vilakku line doorsteps, windowsills and compound walls, and in Tiruvannamalai a giant flame is lit on top of the Annamalai hill. To understand the Karthigai Deepam significance, you have to start with that flame.
This guide explains when the festival falls in 2026, the stories behind it, how it is celebrated at Tiruvannamalai and at home, and how it differs from Deepavali. Varnangal is a Chennai seller of handloom silk sarees woven in Thirubuvanam, and we write about the festivals our customers celebrate.
Quick Answer: What Is the Significance of Karthigai Deepam?
Karthigai Deepam is the Tamil festival of lamps. It falls in the Tamil month of Karthigai, on the day the moon is in the Karthigai (Krittika) star, usually the full moon day. It honours Shiva, who appeared as an endless column of fire, and Murugan, who was raised by the six Krittika mothers. Homes light rows of clay lamps at dusk, and the Maha Deepam is lit on the Annamalai hill at Tiruvannamalai.
Karthigai Deepam 2026 Date
In 2026, Karthigai Deepam falls on Tuesday 24 November, when the Karthigai nakshatra and the full moon of the month come together (check the exact nakshatra timings in a panchang for your city). The Tamil month of Karthigai itself runs from mid-November to mid-December.
Because the festival follows the star and not a fixed date, it moves every year. Families who follow a temple panchangam may light lamps for more than one evening around the main day.
A Festival Older Than Deepavali in Tamil Nadu
Karthigai Deepam is one of the oldest festivals in the Tamil calendar. The Tiruvannamalai district administration notes that it is mentioned in the Akananuru, a Sangam-era anthology of poems, and in poems by the Sangam poet Avvaiyar (Tiruvannamalai district on Karthigai Deepam). Sangam poetry describes streets lit with rows of lamps during the festival.
That long history is why many Tamil families treat Karthigai Deepam, and not Deepavali, as their own festival of lights.
The Stories Behind Karthigai Deepam
1. Shiva as the Endless Column of Fire
The best-known story is about Brahma and Vishnu, who argued over which of them was greater. Shiva appeared between them as a column of fire with no visible beginning or end, and asked them to find its limits. Vishnu took the form of a boar and dug downward, and Brahma took the form of a swan and flew upward. Neither found the end.
Shiva then took the form of the hill at Tiruvannamalai, which is why the hill itself is worshipped as Shiva and the town’s name is linked to fire. The Maha Deepam lit on the hilltop each year recalls this column of light.
2. Murugan and the Six Krittika Mothers
The second story belongs to Murugan. He appeared as six babies in the Saravana Poigai lake and was cared for by the six women of the Krittika (Karthigai) star. Parvati later joined the six children into one, and he became Arumugan, the six-faced one. Because the festival falls on the Karthigai star, it is also sacred to Murugan, and his temples celebrate it in a big way.
Karthigai Deepam at Tiruvannamalai
The biggest celebration is at the Arunachaleswarar temple in Tiruvannamalai. It is one of the five Pancha Bhoota Sthalams, the temples that each stand for one element, and Tiruvannamalai stands for fire. The festival runs for ten days and ends on Karthigai Deepam day.
Bharani Deepam in the Early Morning
Before dawn on the tenth day, the Bharani Deepam is lit in the sanctum of Arunachaleswarar. It is made up of five lamps called Agni Deepams (Government of India’s Utsav portal on the Tiruvannamalai festival).
The Maha Deepam on the Hill at Dusk
At about 6 pm, a huge lamp is lit in a large cauldron on the summit of the Annamalai hill. The flame can be seen for kilometres around, and lakhs of devotees gather in the town to see it. Many walk the girivalam, the path that circles the base of the hill, as an act of devotion.
How Karthigai Deepam Is Celebrated at Home
Cleaning the House and Drawing the Kolam
The day starts with cleaning. Women draw a larger kolam at the entrance than usual, and in the evening the lamps are set on and around it.
Lighting the Agal Vilakku
The heart of the festival is the agal vilakku, the small clay oil lamp. At dusk, families light rows of them at the entrance, on the steps, on windowsills, on the compound wall and around the tulsi plant. Many homes buy new lamps each year and add them to the old ones. The lamps are lit after the evening pooja, and the house stays lit well into the night.
Pori Urundai, Appam and Adai
The festival foods are simple. Pori urundai are balls of puffed rice bound with jaggery syrup. Families also make appam and adai. These are offered at the evening pooja and shared afterwards, and children wait for the pori urundai all year.
Sokkapanai at the Temples
In many Shiva and Murugan temples, a tall pile of dried palm leaves called the sokkapanai is set alight in front of the shrine on the festival night. It is a smaller echo of the column of fire in the Shiva story, and families often visit the local temple to see it before lighting lamps at home.
Karthigai Deepam vs Deepavali: What Is Different?
Both are festivals of light, but they are quite different days:
| Aspect | Deepavali | Karthigai Deepam |
|---|---|---|
|
Tamil month |
Aippasi (October or November) |
Karthigai (November or December), a few weeks later |
|
Time of day |
Morning, starting with an oil bath before sunrise |
Evening, with lamps lit at dusk |
|
Main story |
Krishna’s defeat of Narakasura |
Shiva as the column of fire, and Murugan |
|
What fills the day |
New clothes, crackers and sweets |
Rows of clay lamps, a temple visit and pori urundai |
|
Age in Tamil tradition |
Later |
Older, mentioned in Sangam poetry |
For the Deepavali side of the comparison, read our guide to Deepavali traditions in Tamil Nadu.
Lamp Safety on Karthigai Deepam
With dozens of open flames at floor level, a little care goes a long way. Keep lamps away from curtains and doormats, and do not leave children alone near the rows on the steps. If you are wearing a saree, tuck or pin the pallu before you bend to light the lamps, because a loose silk or cotton pallu can catch a flame quickly.
Conclusion
Karthigai Deepam is Tamil Nadu’s own festival of lamps: a Sangam-era tradition, a column of fire at Tiruvannamalai, the six Krittika mothers of Murugan, and rows of agal vilakku on every doorstep. On 24 November 2026, when the lamps come out, you will know why each one is lit.
Frequently Asked Questions (FAQ)
What is the significance of Karthigai Deepam?
It honours Shiva, who appeared as an endless column of fire to Brahma and Vishnu, and Murugan, who was raised by the six Krittika mothers. Lighting lamps on the day stands for removing darkness and ignorance.
When is Karthigai Deepam in 2026?
Karthigai Deepam falls on Tuesday 24 November 2026, on the Karthigai nakshatra and full moon of the Tamil month of Karthigai. Check a panchang for exact timings in your city.
Why is the Maha Deepam lit at Tiruvannamalai?
Tiruvannamalai is where Shiva is believed to have appeared as the column of fire and then as the hill itself. The Arunachaleswarar temple there stands for the element of fire, so the festival’s main flame is lit on the hilltop.
What sweets are made for Karthigai Deepam?
The best-known is pori urundai, puffed rice balls bound with jaggery. Appam and adai are also made and offered at the evening pooja.
Is Karthigai Deepam older than Deepavali?
In Tamil tradition, it is the older festival. Karthigai Deepam is mentioned in the Akananuru and in poems by Avvaiyar from the Sangam period.
Abirami R – I grew up watching the women in my family drape themselves in vibrant colors, which made me realize that a saree carries both grace and history. With my husband Rajarajan’s encouragement, I turned this fascination into a mission to help you find truly authentic Tamil Nadu weaves. I’ve spent years learning the technical side, like zari weight and thread strength, to protect you from misinformation and help you find pieces worth passing down. My goal is to teach you the soul of the heavy Thirubuvanam silk saree so you can identify a real masterpiece for yourself.
