The full moon is considered a sacred and auspicious time in Buddhism, and Buddhists celebrate it with a certain fervour. The Buddha was born, renounced, attained enlightenment, delivered his first sermon, and passed away on full moon days, which gives the full moon a special significance in Buddhism. The full moon is seen as a time of transformation, abundance of spiritual energy, and an opportunity to partake in special meditations, observe rituals, and delve into a deeper state of stillness.​

Buddhists observe the full moon by undertaking additional precepts beyond the usual five, specifically celibacy, fasting, avoiding entertainments, and so on. This practice is called uposatha, and it is a time of purification for monastics, who gather to recite the Patimokkha, the monastic code of conduct, and confess misdeeds. Laypeople also visit monasteries, prepare food for nuns and monks, listen to chanting and sermons, and help with the maintenance of the monastery grounds.​

The full moon is also a time for spiritual development, meditation, and contemplation. Buddhists believe that the phases of the moon represent the path of death and birth, the repetitive cycle of reaching fullness and then of beginning over again. The moon cycle becomes a friendly reminder of the Buddhist beliefs about rebirth and awakening as reflected by the natural world.​

In Buddhist countries, full moon days are declared as public holidays, and people are encouraged to devote their time to spiritual pursuits. The effects of the moon on life and earth have been analysed scientifically, and researchers have found that the phases of the moon do play a big part in the lives of all living things. The full moon has a strong effect on the human body, and Buddhists believe that it has a particularly strong influence on the mind and consciousness.​

In summary, the full moon is a significant and sacred time in Buddhism, and Buddhists celebrate it with religious fervour by observing precepts, practising meditation, and engaging in spiritual development. The full moon is a time of transformation, abundance of spiritual energy, and an opportunity to partake in special meditations, observe rituals, and delve into a deeper state of stillness. It is also a time of purification for monastics, who gather to recite the Patimokkha, the monastic code of conduct, and confess misdeeds. Laypeople also visit monasteries, prepare food for nuns and monks, listen to chanting and sermons, and help with the maintenance of the monastery grounds. The full moon is a time for spiritual development, meditation, and contemplation, and it is a reminder of the Buddhist beliefs about rebirth and awakening as reflected by the natural world.