Nawam Perahera – Colombo (2nd - 3rd Week Feb)
Sri Lankan Buddhists adopt the use of the lunar calendar. The four phases being (pre) new moon day(when the moon is totally invisible), the half moon, the full moon, and the half-moon of the waning fortnight. Owing to the moon’s fullness and size the full-moon day is treated as the most auspicious of the four phases. Hence the most important religious observances are held on full-moon days. The religious observance days are called Poya days