The primary theme of the Songkran festival in Thailand is the Thai New Year, celebrated in mid-April. It marks the beginning of the traditional lunar calendar and symbolizes the cleansing of sins and bad luck. During this festival, people engage in massive water fights, using water guns and buckets to pour water over each other, which represents the washing away of the past year’s misfortunes. Additionally, the festival includes visiting temples to make merit, honoring elders, and participating in cultural parades, making it a vibrant and joyful occasion reflecting Thai culture and traditions.