Akhanda Dwadashi (Dwadasha Aditya Vratam) is observed on Dwadashi day in the bright half during Margashirsha Month. In 2016, Akhanda Dwadashi date is December 11.
Akhanda Dwadasi vrata is dedicated to worship Lord Krishna. It is observed as three-phases for a year. It is less popular vrata mainly observed by Vaishnava sect of people.
During the first four months (first phase) of the vrata, five pots filled with rice and other food grains are offered to Brahmins. During the second phase of four months, a pot full of dry nuts or dry grams are donated from Chaitra month. In the final phase of four months, ghee is offered to Brahmins.
The first phase of Akhanda Dwadashi vratam – Margasira, Paush, Magh and Phalgun months. The second phase of the vrata – Chaitra, Vaisakh, Jyeshta and Ashada months. The final or the third phase of the vratha – Shravan, Bhadrapad, Ashwin and Karthik months.
In 2015, Akhanda Dwadashi date was December 22.
In 2014, Akhanda Dwadashi date was December 3.