Thursday 01 Jan New Year's Day
Thursday 02 Apr Holy Thursday
Friday 03 Apr Good Friday
Monday 06 Apr Easter Monday
Friday 01 May General Prayer Day
Thursday 14 May Ascension Day
Friday 15 May Day After Ascension
Monday 25 May Whit Monday
Friday 05 Jun Constitution Day
Thursday 24 Dec Christmas Eve
Friday 25 Dec Christmas Day
Thursday 31 Dec New Year's Eve
Source: http://www.nasdaqomxnordic.com/tradinghours