AS many of us celebrate Christmas this December, the Buddhist faith has its own commemorative events that captures the spirit of its community. The Buddhist calendar is a lunar calendar and celebrations are held on the full moon day each month. Every Poya (full moon) day has its own name and commemorates key events in Buddhism. Unduvap Full Moon Poya is in December. This day celebrates Buddhist Nun, Bhikkhuni Arahant Sanghamitta Theri (the daughter of Indian Emperor Asoka), bringing to Sri Lanka, a sapling from the Bodhi tree under which The Buddha became enlightened. The sapling was planted in Anuradhapura by King Devanampiya Tissa and is the oldest historically authenticated human-planted tree in the world.