Thursday 01 Jan New Year's Day
Thursday 02 Apr Maundy Thursday
Friday 03 Apr Good Friday
Monday 06 Apr Easter Monday
Thursday 23 Apr First Day of Summer OBS
Friday 01 May Labour Day
Thursday 14 May Ascension Day
Monday 25 May Whit Monday
Wednesday 17 Jun National Day
Monday 03 Aug Bank Holiday
Thursday 24 Dec Christmas Eve
Friday 25 Dec Christmas Day
Thursday 31 Dec New Year's Eve
Source: http://www.nasdaqomxnordic.com/tradinghours