^Crawfurd, John. Chapter I. Journal of an Embassy from the Governor-general of India to the Courts of Siam and Cochin China. Volume 2 2nd. London: H. Colburn and R. Bentley. 21 August 2006: 32 [1830]. OCLC 3452414. The Siamese year does not commence with the first month, but corresponds with that of the Chinese. In the year 1822, the new year fell on 11 April, being the 5th day of the dark half of the moon.... The Siamese have two epochs, or, as they describe them, Sa-ka-rat. The sacred one dates from the death of Gautama, and the year which commenced on 11 April 1822, was the year 2365, according to this reckoning.
^Crawfurd, John. Chapter I. Journal of an Embassy from the Governor-general of India to the Courts of Siam and Cochin China. Volume 2 2nd. London: H. Colburn and R. Bentley. 21 August 2006: 32 [1830]. OCLC 3452414. The Siamese year does not commence with the first month, but corresponds with that of the Chinese. In the year 1822, the new year fell on 11 April, being the 5th day of the dark half of the moon.... The Siamese have two epochs, or, as they describe them, Sa-ka-rat. The sacred one dates from the death of Gautama, and the year which commenced on 11 April 1822, was the year 2365, according to this reckoning.
^J.C. Eade. The calendrical systems of mainland southeast asia. E.J. Brill, Leiden. : 22. ISBN 90-04-10437-2. According to some scholars including George Coedes the change occurred at the beginning of the 5th lunar month originally a few days before Songkhran.
