It is also known as Thai Traditional New Year's Day, which falls during April of 13th - 15th every year. Actually,The word "Songkran" derives from Sanskrit language and means to pass or to move into. Songkran festival takes place over three days every year, on the 13th - 15th of April. Songkran is one of Thailand's National Holidays. During this time, people from rural areas, who work in a city like Bangkok, return home to celebrate the festival.