2011 Hong Kong holidays are as follows:
The first day of January 1 January Saturday
Lunar New Year's Day 3 February Thursday
The second day of the Lunar New Year 4 February Friday
The third day of the Lunar New Year 5 February Saturday
Ching Ming Festival 5 April Tuesday
Good Friday 22 April Friday
The day following Good Friday 23 April Saturday
Easter Monday 25 April Monday
The day following Labour Day 2 May Monday
The Buddha’s Birthday 10 May Tuesday
Tuen Ng Festival 6 June Monday
Hong Kong Special Administrative Region 1 July Friday
Establishment Day
The day following Chinese Mid-Autumn Festival 13 September Tuesday
National Day 1 October Saturday
Chung Yeung Festival 5 October Wednesday
The first weekday after Christmas Day 26 December Monday
The second weekday after Christmas Day 27 December Tuesday

The peak time to visit Hong Kong is September to around Christmas time. For hotel, I would like to recommend you Regal Hong Kong Hotel, The Park Lane Hotel, Hong Kong, Regal Airport Hotel, Hong Kong or Ramada Hong Kong Hotel.