The central concept behind the Songkran festival in Thailand is the celebration of the new year through the ritual of water pouring. This traditional ritual symbolizes the washing away of bad luck and sins, promoting a fresh start. During the festival, participants engage in lively water fights and processions, often using water guns and buckets. The festival not only fosters a sense of community but also emphasizes the importance of family and respect for elders through ceremonial water blessings.