I'm planning to travel to Putuoshan at March 28, 29 and 30. Will I see any commemoration to Guanyin?

I already reserved a hotel for twoo nights and I'm arriving by boatfrom Shanghai the 28 March 2013 around 12:00 a.m.. I read somewhere that this date was for commemorating the birthday of Guanyin, but someone told me the birthday of the goddess is the 19 February. I would like to be sure that there will be some ceremony connected to Guanyin these days. Thank you very much for your kind answer,

Clara