King Nangklao Memorial Day in Thailand
King Nangklao Memorial Day in Thailand is held on March 31. This event in the third decade of the month March is annual. 
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Adopted 1 September 1992. Commemorates the birth anniversary of King Rama III.
Nangklao (31 March 1788 – 2 April 1851), birth name Thap, also styled Rama III, was the third king of Siam under the House of Chakri, ruling from 21 July 1824 to 2 April 1851.
Nangklao was the eldest surviving son of his predecessor, king Rama II. His mother Sri Sulalai was one of the king's secondary wives. Nangklao was likely designated as heir by his father, his accession was uncontested and smoothly confirmed by the grand council. Foreign observers, however, falsely perceived him as having usurped the prior claim of his half-brother Prince Mongkut, who was younger, but born to queen Sri Suriyendra and thus "legitimate" according to Western customs. Under the old concept of Thai monarchy, however, a proper king must emulate Maha Sammata in that he must be "elected by the people." Ironically, Prince Mongkut may have later contributed to this misconception, when he feared that his own accession might be perceived by foreign observers as a usurpation.
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