The festival that involves the creation of intricate sand mandalas is the Vesak festival, commemorating the birth, enlightenment, and death of the Buddha. During this celebration, practitioners create colorful sand mandalas as a form of meditation that symbolizes the impermanence of life. This art form reflects Buddhist teachings, emphasizing mindfulness and the beauty of the moment. Once completed, the mandalas are often destroyed in a ceremonial practice, representing the cycle of life and the importance of detachment. Vesak serves to foster deeper understanding and connection to Buddhist values.