Wednesday 01 Jan New Year's Day
Thursday 17 Apr Holy Thursday
Friday 18 Apr Good Friday Monday 21 Apr Easter Monday Friday 16 May General Prayer DayThursday 29 May Ascension Day
Friday 30 May Day after AscensionThursday 05 Jun Constitution Day
Monday 09 Jun Whit MondayWednesday 24 Dec Christmas Eve
Thursday 25 Dec Christmas Day
Friday 26 Dec Christmas HolidayWednesday 31 Dec New Year's Eve
Source: http://www.six-swiss-exchange.com/shares/trading/trading_calendar/