The traditional New Year in Thailand is known as Songkran and the festival takes place every April over several days of fun.
The festival coincides with many other south- and southeast-Asian country's calendars and is famous for for its water-pouring and soaking street parties throughout the country.
The water is meant as a symbol of washing all of the bad away and making a fresh start. It also heralds the commencement of Thailand's rainy season.
The traditional water-pouring is a gentle affair, but in some city streets, particularly the famous Khao San road in Bangkok, you can join in what must be one of the largest friendly water fights in the world.
As April is the hottest month of the year in Thailand, this is often the best way to cool down.