Yes, that's not a typo, it's the 800th anniversary of the order of YSW's Catholic Portiuncula Monastery, just besides the Lady of Lourdes Kindergarten.
HK's only two cardinals, directly reporting to the Pope, will be holding Cantonese and English masses. There'll be a musical play at noon by the "Lamma Island Young Artist Guild" about the life of St. Clare and how "the poorer she became, the happier she was". Great photo opportunities, for sure.
For an idea on how it might look like, former visits by Cardinal Zen for the yearly birthday of St. Clare and some background on YSW's cheerful nuns:
http://www.compunicate.com/Lamma-zine/PG-Bishop-Zen.htm
http://www.compunicate.com/Lamma-zine/PG/Bishop-Zen-05.htm