Monday 02 Jan Berchtoldstag
Friday 06 Apr Good Friday
Monday 09 Apr Easter Monday
Tuesday 01 May Labour Day
Thursday 17 May Ascension Day
Monday 28 May Whit monday
Wednesday 01 Aug National Day
Tuesday 25 Dec Christmas Day
Wednesday 26 Dec St.Stephen's Day
Source: http://www.six-swiss-exchange.com/shares/trading/trading_calendar/calendar/2012/grid_en.html