Uposatha is a Buddhist observance day that occurs four times a lunar month, typically on the full moon, new moon, and the two quarter moons. It is a time for reflection, meditation, and renewal of commitment to the Buddha's teachings. Devotees often engage in rituals, listen to sermons, and practice moral precepts more diligently during this period. On Uposatha days, many Buddhists choose to observe additional precepts, such as refraining from harmful actions and focusing on spiritual development. This practice helps individuals deepen their understanding of Dharma and cultivate mindfulness, fostering a sense of community and shared purpose among practitioners.