Onam is the ten-day harvest festival of Kerala, observed during the Malayalam month of Chingam (August-September) on the days running from the Atham asterism to the Thiruvonam asterism. In 2026 the festival opens with Atham on Monday, 17 August, and closes with Thiruvonam (the principal day) on Wednesday, 26 August. The festival commemorates the annual return of King Mahabali, the asura ruler under whose reign Kerala enjoyed a legendary period of equality and abundance; Mahabali was sent to the underworld by Vishnu’s Vamana avatar, and Vishnu granted him the boon of visiting his subjects once a year on Thiruvonam. The festival’s three principal markers are the Pookkalam (floral carpet) renewed daily for ten days, the Sadhya (the multi-dish vegetarian feast on Thiruvonam), and the cultural events including Vallam Kali (boat races) and Pulikali (tiger dance).
The Mahabali story
The story is in the Bhagavata Purana (Book 8, chapters 15-23) and the Vamana Purana. Mahabali, the asura grandson of Prahlada, ruled the three worlds with such justice and generosity that under his reign there was no inequality, no fear, no poverty, no falsehood. The devas, displaced from heaven, appealed to Vishnu. Vishnu manifested as Vamana, a dwarf brahmana, and approached Mahabali during a yajna asking for three paces of land. Mahabali, despite warnings from his guru Shukracharya, granted the request. Vamana grew to cosmic size: the first pace covered the earth, the second covered the heavens. For the third, Mahabali, recognising Vishnu, offered his own head; Vamana placed his foot on Mahabali’s head and sent him to Patala, the underworld. Moved by Mahabali’s devotion, Vishnu granted him the boon of returning to Kerala annually to see his subjects.
The festival is the welcoming of Mahabali home. The Pookkalam at the threshold of each house is to greet him; the Sadhya is the feast offered to show that Kerala is prosperous and well; the cultural events are to demonstrate joy. The reading is significant: Kerala’s principal festival celebrates not the victorious deity (Vishnu) but the defeated and exiled king (Mahabali), who returns annually because he was a just and generous ruler. The festival’s emotional centre is the figure of Mahabali rather than Vamana.
The ten days in order
- Atham (Day 1, 17 August 2026): the first day of the festival. A small circular Pookkalam is laid at the threshold using yellow flowers only; the family begins fasting from non-vegetarian food and starts preparation.
- Chithira (Day 2): the Pookkalam grows by one tier; new flowers are added each day.
- Chodi (Day 3): shopping for new clothes (Onakkodi) typically begins; the family begins exchange visits with relatives.
- Vishakam (Day 4): competitive Pookkalam contests in Kerala neighbourhoods begin.
- Anizham (Day 5): Aranmula Vallam Kali (snake-boat race), one of the festival’s principal events, is held on the Pampa river.
- Thriketta (Day 6): Onathallu (martial arts displays) and Kummattikali (masked folk dance) are performed.
- Moolam (Day 7): temples hold the principal Onam offerings; women perform Thiruvathirakali (a circular dance).
- Pooradam (Day 8): the figure of Mahabali (Onathappan), a small clay or wooden pyramid representing the king, is placed at the centre of the Pookkalam.
- Uthradam (Day 9): the day before Thiruvonam. Households complete cooking preparations; new clothes are kept ready; the courtyard is cleaned thoroughly.
- Thiruvonam (Day 10, 26 August 2026): the principal day. The Sadhya is served at noon; Mahabali is welcomed; the family wears new clothes; gifts are exchanged.
The Pookkalam
The Pookkalam (literally “flower carpet”) is a circular floral design laid at the threshold of the house, renewed and expanded each of the ten days. The Atham Pookkalam is the smallest, often a single tier of yellow flowers. By Thiruvonam the Pookkalam has reached its maximum size, sometimes 10 to 12 feet in diameter, with concentric rings of different coloured flowers and a central Onathappan figure.
The flowers most used are thumba (Leucas aspera, small white), thechi (Ixora, red), chembarathi (hibiscus, red), mukkutti (little tridax, yellow), nandhyarvattam (East India rosebay, white), and a wide range of jasmine, marigold and rose for filling. Children of the household traditionally collect the flowers each morning before the Pookkalam is laid.
The Onam Sadhya
The Sadhya is the festival’s most elaborate single object: a vegetarian feast of twenty to thirty dishes, served on a banana leaf, in a fixed traditional order. The leaf is placed with the tapered end pointing left of the diner. The dishes are placed in fixed positions around the rim and on the leaf in a specific sequence.
A representative Sadhya menu:
- Rice: par-boiled red Kerala rice (matta), served generously as the meal’s centre.
- Side dishes around the rim of the leaf (left to right): sharkkara upperi (banana fried in jaggery), upperi (plain banana chips), thoran (stir-fried vegetable with coconut), kichadi (curd-based vegetable), pachadi (sweet curd-based), olan (ash gourd and cowpea in coconut milk), avial (mixed vegetable in coconut paste), erissery (pumpkin and cowpea), kalan (yam and raw plantain in curd), pickle (mango or lime), pappadam.
- Sambar and rasam: served with the rice in two rounds.
- Pulissery or moru: curd-based curry, served as the third round.
- Curd: with the rice, in the final savoury round.
- Payasam: the dessert, typically two or three varieties. Ada pradhaman (rice flake and jaggery), parippu pradhaman (moong dal and jaggery), palada (rice ada and milk), pal payasam (rice and milk).
The Sadhya is eaten with the right hand, in the order in which the dishes are positioned. The meal closes with the banana leaf folded inward (from top to bottom for satisfaction; from bottom to top for dissatisfaction with the meal). The folding direction is a traditional courtesy and is observed in temple kitchens and at large public Sadhya events.
Cultural events
- Vallam Kali (snake-boat races): the principal event is the Nehru Trophy Boat Race on the Punnamada Lake at Alappuzha, instituted in 1952 after Nehru’s 1952 visit. Other major races include the Aranmula Uthrattadi Vallamkali on the Pampa river and the Champakulam Moolam Boat Race. The boats (Chundan Vallams) are over 100 feet long and seat over a hundred rowers; the rowing is synchronised to traditional Vanchipattu boat songs.
- Pulikali (tiger dance): men paint themselves as tigers and parade through the streets of Thrissur on the fourth day of Onam; the practice was instituted by Maharaja Rama Varma Sakthan Thampuran in the 18th century.
- Kathakali: the traditional Kerala dance-drama, performed at major temples through the ten days.
- Thiruvathirakali: a circular women’s dance performed around a brass lamp.
- Onathallu / Kayyankali: martial arts displays drawn from Kalaripayattu, performed publicly during the festival.
For what it’s worth, the most defensible single experience for a first-time visitor to Kerala during Onam is the Sadhya at a traditional household or a registered Sadhya hall, rather than at a tourist hotel. The community version of the meal, served on banana leaves in the traditional sequence, with rice and vegetables that come from the household’s own preparations, is closer to the festival’s actual centre than any commercial buffet version. Sadhya halls in Kochi, Thrissur and Thiruvananthapuram serve the meal to outside diners by reservation.
Common questions
Why does Kerala celebrate the defeated king?
The Kerala reading of the Mahabali story treats him as the just and beloved king whose reign was a golden age; his return is the festival’s centre. The Vishnu-Vamana strand is acknowledged as the cosmological frame but receives less emotional weight in the regional observance. The festival is unusual in the Hindu calendar in its sympathy for the asura figure; the Onam folk song “Maveli nadu vaneedum kalam” (“In the times when Maveli ruled”) is the festival’s anthem and is straightforwardly about Mahabali’s egalitarian reign.
Is Onam celebrated only by Hindus?
No. Onam is observed across all communities in Kerala as a cultural festival; Christian, Muslim and Jewish Keralites participate in the Pookkalam, the Sadhya, the public events and the cultural performances. The festival has been treated as a state-wide cultural event by the Kerala Government since 1961, with the official Onam celebrations including a state procession from Kerala’s capital. The Hindu mythological frame is the festival’s origin; the contemporary observance is broadly inclusive.
What is Onakkodi?
Onakkodi (literally “Onam clothes”) is the tradition of giving new clothes to all family members for Thiruvonam. The eldest member of the family traditionally gives Onakkodi to the rest; in many households the head of household gives to wife and children, parents give to married daughters who visit, and so on. The Kerala textile industry’s largest single-week sale of the year falls in the days before Thiruvonam.
A limitation worth noting
Sub-regional Kerala variations in the Sadhya menu and the order of serving are extensive: Travancore, Cochin and Malabar each have their own conventions. The number and order of dishes above is broadly representative but not authoritative for any specific household. Vallam Kali race dates and Nehru Trophy schedules are published annually by the Kerala Tourism Department at keralatourism.org. For an overview see the Wikipedia entries on Onam and Onam sadhya.
