Aava.Wong - according to this website you've listed, Monday is NOT a statutory holiday. Only Tuesday, Ching Ming Festival.
tuesday is the "day" following ching ming festival so monday the 5th of april is still a stat hol.
my helper started working from nov 2009 but i let her have all the stat hols since the start of her work. it really depends on you and how much you need her around. personally, i'd like to be with my family on my days off so i let her visit friends/relatives when i'm home with bub and hub.