Tuesday 01 Jan New Year's Day
Thursday 28 Mar Maundy Thursday
Friday 29 Mar Good Friday
Monday 01 Apr Easter Monday
Thursday 25 Apr Bank Holiday
Wesnesday 01 May Labour Day
Thursday 09 May Ascension Day
Monday 20 May Whit Monday
Monday 17 Jun National Day
Monday 05 Aug Bank Holiday
Tuesday 24 Dec Christmas Eve
Wednesday 25 Dec Christmas Day
Thursday 26 Dec Boxing Day
Tuesday 31 Dec New Year's Eve
Source: http://www.nasdaqomxnordic.com/tradinghours/