New Delhi: The wait is over for Malayalis across Kerala and around the world. Onam 2026 begins today, August 16, with Atham, setting in motion 10 days
of colour, flowers, feasting and festivities that culminate in Thiruvonam on August 26. But Atham is more than the first square on the Onam calendar: it is the day when homes begin preparing to welcome the legendary King Mahabali, with the first pookalams taking shape and Kerala’s cultural celebrations coming alive.
What is Atham
Atham is the first day of the traditional 10-day Onam celebrations and is named after the Atham nakshatra, or lunar mansion, in the Malayalam month of Chingam. In other Hindu calendars, Atham is known as Hasta. Onam’s main day, Thiruvonam, falls on August 26 this year.
The festival is deeply associated with the legend of King Mahabali, the benevolent ruler whose prosperous reign is remembered as an ideal age. According to the traditional story, Vishnu appeared as Vamana, asked Mahabali for three paces of land and ultimately sent him to the netherworld, while granting him permission to return once a year to see his people. Onam celebrates that annual homecoming.
Atham 2026: What happens today
One of the most recognisable Atham traditions is the beginning of the Athapookalam, the floral carpet laid outside homes. Kerala Tourism notes that the first pookalam is traditionally simple and grows in size and intricacy through the days of Onam, with different flowers added as the festival progresses. The floral decoration symbolises prosperity, joy and the welcoming of Mahabali.
Families may also clean and decorate their homes, visit temples, offer prayers and begin preparations for the days ahead. Customs vary considerably by region and community, so there is no single mandatory Atham ritual for every Malayali household.
In some traditions, Thrikkakara Appan or Mathevar figures are associated with the pookalam and Onam worship, although the timing and form of the ritual differ across Kerala.
Athachamayam: Spectacular start to Onam
Atham also brings one of Kerala’s most famous cultural processions – Athachamayam at Thripunithura in Ernakulam. Held on the Atham asterism, the event features folk art forms, decorated elephants, musical ensembles and colourful floats. Historically, it recalls the ceremonial procession of the Cochin king and his entourage. Kerala Tourism describes the modern celebration as a symbol of Kerala’s cultural heritage and religious harmony.
Kerala Tourism’s 2026 festival calendar lists Athachamayam for August 16, while Thiruvonam is scheduled for August 26.
What should you do on Atham
For those observing Onam at home, Atham is a good day to:
- Make the first pookalam, traditionally keeping it relatively simple and adding to it each day.
- Clean and decorate the home as part of preparations for the festival.
- Visit a temple and offer prayers, according to family tradition.
- Begin planning the Onam Sadya, gifts and festive clothing for the days ahead.
- Take part in local cultural programmes, particularly Athachamayam where accessible.
- Most importantly, celebrate together – Onam’s traditions centre on hospitality, community and the idea of welcoming Mahabali.
The celebrations then build through Chithira, Chothi, Vishakam, Anizham, Thriketta, Moolam, Pooradam and Uthradam before reaching their grand climax on Thiruvonam, August 26. Pookalam-making expands, cultural events gather momentum, and the iconic Onam Sadya becomes central to the festivities.
From the first flower placed on Atham to the elaborate feast on Thiruvonam, the essence of Onam remains remarkably consistent: a celebration of abundance, togetherness and the enduring memory of a king whose return is welcomed as warmly today as it was in legend.
