Songkran today is still the most important of all the Thai festivals and holidays. It marks the beginning of a new astrological year and is much in keeping with the old lunar calendar of Siam. It is officially celebrated this year on April 12, but the festival actually takes place over a period of four days. It includes the 'Troot Festival' discussed above as well as all the merit-making at Buddhist temples and the ultimate Songkran, or The Pouring of Water ritual, by which we have come to identify Songkran with today. Each year, the four-day celebration of Songkran consists of many activities, and these are briefly explained below.