Day Date Month Holiday Friday 01 Jan New Year's Day Wednesday 23 Mar Half trading day (Wednesday beforeEaster) Thursday 24 Mar Maundy Thursday Friday 25 Mar Good Friday Monday 28 Mar Easter Monday Thursday 05 May Ascension Day Monday 16 May Whit Monday Tuesday 17 May Constitution Day Monday 26 Dec Boxing Day Source: http://www.oslobors.no/ob_eng/Oslo-Boers/About-Oslo-Boers/Opening-hours