Monday 2 Jan The day following the first day of January
Monday 23 Jan Lunar New Year's Day
Tuesday 24 Jan The second day of the Lunar New Year
Wednesday 25 Jan The third day of the Lunar New Year
Wednesday 4 Apr Ching Ming Festival
Friday 6 Apr Good Friday
Monday 9 Apr Easter Monday
Tuesday 1 May Labour Day
Monday 2 Jul The day following Hong Kong Special Administrative Region Establishment Day
Monday 1 Oct The day following the Chinese Mid-Autumn Festival
Tuesday 2 Oct The day following National Day
Tuesday 23 Oct Chung Yeung Festival
Tuesday 25 Dec Christmas Day
Wednesday 26 Dec The first weekday after Christmas Day
Note: The following business days are half-day trading days (i.e. No Extended Morning and Afternoon sessions) and non-settlement days for Exchange Trades and Non-Exchange Trades (i.e. Settlement Instruction and Investor Settlement Instruction):
24 December 2012 (Monday) - Eve of Christmas Day
31 December 2012 (Monday) - Eve of New Year
Source: http://www.hkex.com.hk/eng/market/sec_tradinfo/tradcal/nont10.htm