Day Date Month Holiday
Wednesday 12 Apr Half trading day (Wednesday before Easter)
Thursday 13 Apr Maundy Thursday
Friday 14 Apr Good Friday
Monday 17 Apr Easter Monday
Monday 01 May Labour Day
Wednesday 17 May Constitution Day
Thursday 25 May Ascension Day
Monday 05 Jun Whit Monday
Monday 25 Dec Christmas Day
Tuesday 26 Dec Boxing Day
Source: http://www.oslobors.no/ob_eng/Oslo-Boers/About-Oslo-Boers/Opening-hours