Asom Divas ( অসম দিৱস ) is observed every year on 2nd December in the entire state of Assam. This special day is also known as the Sukaphaa Divas, which commemorates the arrival of the first king of the Ahom Empire in Assam. People from Assam mark this day by remembering the great king Swargadeo Chaolung Sukaphaa.

Swargadeo Chaolung Sukapha, also known as “ Siu-Ka-Pha “ laid the foundation of “ Bor Assam “ and played a significant role in the formation of the Greater Assamese community. Founder of the 600-year-old Ahom kingdom, Swargadeo Chaolung Sukapha unified the land and was a symbol of harmony, good governance & courage.

Sukaphaa is known by the people for being a strong, courageous, and bold leader along with his significant role in unifying the various indigenous ethnic groups of Assam. It is believed that Sukaphaa arrived in Namrup, Assam on 2nd December 1228. Thus, December 2, the date of his arrival is regarded as the founding date of the Ahom Kingdom.

In 1215, Chaolung Sukaphaa, prince of the Tai Ahom clan of the Maolung kingdom of Yunnan Province, China, left for the Brahmaputra Valley with eight nobles and officers, 9000 men, women, children, two elephants, and 300 horses - After making it, in 1228 it entered the Soumar sector ( সৌমাৰ খণ্ড ).

Avoiding war, Sukaphaa wisely united the small ethnic kingdoms on both sides of the Brahmaputra to form “Assam” and the “Assamese”. They gave up their language - Tai, and their religion Taoism to maintain unity among all and together with all the people’s contributed to the creation of a new language. The Ahoms ruled for six hundred years following his great example. Sukaphaa also started the tradition of writing history in Assam. His contributions to winning the support and hearts of the tribal population in the state are often remembered and praised. For this instance, Sukaphaa is referred to as the architect of “Bor Asom” ( Greater Assam ).

Since 1996 December 2 has been celebrated in Assam as the Sukaphaa Divox, or Axom Divox (Assam Day), to commemorate the advent of the first king of the Ahom kingdom in Assam after his journey over the Patkai Hills. In 1268 Sukaphaa died. At the time of his death, his kingdom was bounded by the Brahmaputra River in the west, the Disang River in the north, the Dikhow River in the south, and the Naga Hills in the east. After his death, his son Suteuphaa succeeded his father.

Padmanath Gohani Barua, a prominent Assamese Literary and the first president of Asam Sahitya Sabha wrote in his book “Buranji of Assam '' (অসমৰ বুৰঞ্জী ) –  “Sukaphaa was a wise politician and great king of Assam. He was as skilled in conquering the country as he was in ruling. Swargadeo Sukaphaa relaxed his practice and made it a rule to use the language of the people in his royal affairs. He ruled here for 39 years and kept the inexhaustible reputation of his Assamese power.”