Kathina Ceremony (Robe offering ceremony)
It is held on any convenient date within one month of the conclusion of the Vassa Retreat, which is the three month rains retreat season (Vassa) for the monastic order. It is the time of the year when new robes and other requisites may be offered by the laity to the monks.
Anapanasati Day
At the end of one rains retreat (vassa), the Buddha was so pleased with the progress of the assembled monks that he encouraged them to extend their retreat for yet another month. On the full-moon day marking the end of that fourth month of retreat, he presented his now-famous instructions on mindfulness of breathing (anapanasati), which may be found in the Anapanasati Sutta (MN 118), The Discourse on Mindfulness of Breathing.
Abhidhamma Day
In the Burmese tradition, this day celebrates the occasion when the Buddha is said to have gone to the Tushita Heaven to teach his mother the Abhidhamma. It is held on the full moon of the seventh month of the Burmese lunar year starting in April which corresponds to the full moon day in October.
[http://www.buddhanet.net/festival.htm]
Morality
Morality is the preliminary stage on the path to attain Buddhahood. It is a necessary condition, though not sufficient, leading to wisdom. It is absolutely essential for enlightenment. Morality in Buddhism is a rational and practical mode based on verifiable facts and individual experience, which is regarded as the one of the most perfect moral code ever known in the world.