Friday 06 Jan Epiphany Friday 06 Apr Good Friday Monday 09 Apr Easter Monday Tuesday 01 May Labour Day Thursday 03 May Constitution Day Thursday 07 Jun Corpus Christi Wednesday 15 Aug Assumption Day Thursday 01 Nov All Saint's Day Monday 24 Dec Christmas Eve Tuesday 25 Dec Christmas Day Wednesday 26 Dec St.Stephen's Day Monday 31 Dec New Year's Eve
Source: http://www.gpw.pl/dni_bez_sesji_en