About Assam Day
Assam Day, also called Asom Divas or Sukaphaa Divas, is observed in Assam on 2 December in honour of Chaolung Sukaphaa, the Tai prince who founded the Ahom kingdom after reaching the Brahmaputra valley in 1228. It is not the state's formation day. The Government of Assam observes it with cultural programmes and seminars, and in 2026 it falls on Wednesday, 2 December 2026.
Most Indian state days mark a date in the twentieth century. Assam Day reaches back nearly eight hundred years, to a band of migrants who crossed the Patkai hills from what is now Myanmar and settled in the Brahmaputra valley.
Why is Assam Day celebrated on 2 December?
Assam Day is celebrated on 2 December to honour Sukaphaa, the founder of the Ahom kingdom, and the conventional date of his arrival in the Brahmaputra valley in 1228. It is also called Asom Divas or Sukaphaa Divas. It does not mark the creation of the modern state of Assam, which existed as a province under British rule and became a state of independent India in 1950.
Sukaphaa was a Tai prince from Möng Mao, near present-day Ruili in Yunnan, China. According to the Ahom chronicles, the Buranjis, he set out around 1215 with about 9,000 people, including soldiers, priests and families, and spent some thirteen years travelling through upper Burma and over the Patkai range before reaching the valley.
Historians do not all accept that date. Some scholars, working from inconsistencies in the Buranjis and from script evidence, argue that the Ahom polity was established in the mid-fourteenth century instead. Asom Divas follows the traditional date.
Why is Sukaphaa remembered as a unifier?
Sukaphaa is remembered less as a conqueror than as the leader of a farming community looking for land. He married into local families, including the daughters of Moran and Borahi chiefs, and brought local people into his settlement, a process historians call Ahomisation, in which people of other communities could become Ahom through loyalty or useful skills. He also crushed groups that resisted him, which the chronicles record plainly.
He settled his capital at Charaideo, "the shining city on the hills" in the Tai-Ahom language, in 1253 and died in 1268. The kingdom he founded grew to cover most of the Brahmaputra valley and lasted until 1826, when the Treaty of Yandabo, after the Burmese invasions, handed Assam to the British.
Along the way the Ahom state fought off repeated Mughal campaigns. At the Battle of Saraighat on the Brahmaputra in 1671, the general Lachit Borphukan defeated a much larger Mughal force under Raja Ram Singh. Lachit is remembered on Lachit Divas, 24 November, and the National Defence Academy's best passing cadet receives a gold medal in his name.
The Ahom language fell out of everyday use by the early nineteenth century, and today's Ahom community, estimated at over two million people, speaks Assamese. The Tai script survives in manuscripts and rituals.
How is Asom Divas observed?
Asom Divas is observed by the Government of Assam with cultural programmes, seminars, exhibitions and school events on Ahom history, and it is a regional holiday in the state. Traditional music and dance are performed, and tributes are paid at statues and memorials of Sukaphaa. The Sukaphaa Samanway Kshetra in Jorhat is one of the main memorials to him.
The observance began as a community effort. The social worker Bhimkanta Buragohain started organised celebrations in Upper Assam in 1972. Sources differ on when the state formally adopted it: one account says Chief Minister Prafulla Kumar Mahanta attended the celebration at Judges Field in Guwahati in 1987 and declared it Asom Divas, while others date the official observance of 2 December from 1996.
Charaideo, the first capital, has become part of the day's story. Its moidams, the earth-covered burial mounds of Ahom royalty, were inscribed as a UNESCO World Heritage Site on 26 July 2024. Of the more than 150 known, about 30 are protected by the Archaeological Survey of India and the state.
| Date | Occasion | What it marks |
|---|---|---|
| 2 December | Asom Divas | Sukaphaa's arrival and the founding of the Ahom kingdom |
| 24 November | Lachit Divas | Birth anniversary of Lachit Borphukan, victor of Saraighat |
| 31 January | Me-Dam-Me-Phi | Ahom ancestor worship, now observed on a fixed date |
| Mid-January | Magh Bihu | The harvest festival, with bonfires and community feasts |
| Mid-April | Bohag Bihu | The Assamese New Year and spring festival |
What should you write on Assam Day?
An Assam Day message reads best when it is about Assam as a whole: its river, its hills, its tea gardens and the many peoples who share it. Sukaphaa's story is one of settlers and locals becoming one society, so an inclusive wish fits the day. "Asom Divasor shubhechha", greetings on Assam Day, works as an Assamese line for friends and family.
Asom Divasor shubhechha. Here's to Assam, to the Brahmaputra, and to every good cup of tea your family has ever made me.
Warm wishes on Sukaphaa Divas. Nearly eight centuries since Chaolung Sukaphaa crossed the Patkai, and his story is still yours to tell.
Asom Divasor shubhechha, Deuta and Ma. Missing home today; save me some pitha for when I'm back.
Happy Assam Day. Wishing you and your families a proud Asom Divas, from the tea gardens to Guwahati.
Happy Asom Divas. The Ahoms kept the Mughals out and kept records for six centuries. Read a Buranji this week.
Do
- Keep the wish inclusive; Assam is home to Assamese, Bodo, Karbi, Mising, Bengali, tea-garden and many other communities.
- Use Sukaphaa's full name, Chaolung Sukaphaa, when writing to Ahom friends.
Avoid
- Don't confuse Asom Divas with Bihu; it is a history day, not a harvest festival.
- Avoid using the day to set one community against another.
For Assam's festival calendar, see Magh Bihu and Bohag Bihu, or browse the 2026 calendar.
How to wish someone on Assam Day
Asom Divas is about Assam's long history and the mixing of peoples that Sukaphaa's kingdom stood for, not about one community's pride. A good wish is inclusive: it names Assam, its river, its tea and its many peoples, and treats the Ahom past with respect. For Ahom friends, mentioning Sukaphaa by name, as Chaolung Sukaphaa, shows you know whose story it is.
Write a few lines in your own words, pick a design and share it as one link on WhatsApp, Instagram or anywhere else. They open an animated card made just for them, with no app and no sign-up.
Language tip: English, Hindi + regional language.
When is Assam Day in 2026 and 2027?
Assam Day is on 2 Dec every year. Only the weekday changes.
- 2026
- 2027
Frequently asked questions
When is Assam Day in 2026?
Assam Day 2026 falls on Wednesday, 2 December 2026.
Who was Sukaphaa?
Sukaphaa, also written Chaolung Sukaphaa, was a Tai prince from Möng Mao in present-day Yunnan who founded the Ahom kingdom. By tradition he reached the Brahmaputra valley in 1228 and made Charaideo his capital in 1253.
Is Assam Day the formation day of the state of Assam?
No. Assam Day, or Asom Divas, commemorates Sukaphaa's arrival in 1228 and the founding of the Ahom kingdom. It is not linked to any date in the modern state's administrative history.
How long did the Ahom kingdom last?
The Ahom kingdom lasted about six hundred years, from Sukaphaa's arrival in 1228 until 1826, when the Treaty of Yandabo, which ended the First Anglo-Burmese War, brought Assam under British control.
What are the Charaideo moidams?
The Charaideo moidams are earth-covered burial mounds of Ahom kings and nobles at Charaideo, the first Ahom capital, in Upper Assam. They were inscribed as a UNESCO World Heritage Site on 26 July 2024.
Is Asom Divas the same as Bihu?
No. Asom Divas on 2 December is a history day honouring Sukaphaa. Bihu is Assam's set of seasonal festivals: Bohag Bihu in April, Kati Bihu in October and Magh Bihu in January.
Last verified by the Kehdoo team on .