The Shift from April 13 to January 1: The Evolution of New Year's Day in Thailand
New Year's Day in Thailand shifted from April 13 to January 1 in 1941, discarding a long-standing tradition that coincided with Songkran, originally on the onset of Aries astrologically.
This festival, named from the Sanskrit "sankranti," symbolizes transition and is significant in various Asian cultures.
Field Marshal Plaek Phibunsongkhram, leader at the time, initiated the change to align with global standards. Even before official adoption, Western New Year celebrations were familiar in Siam; King Rama IV had engaged in New Year's exchanges with Western contacts since 1866.
The Gregorian calendar was introduced in Siam in 1889, bringing Thai names for months and initially setting April 1 as New Year's. This marked a departure from the former lunar calendar that celebrated New Year's on the first day of the fifth lunar month. The shift to January 1 was finalized in 1941.