Day Date Month Holiday Friday 06 Jan Epiphany Monday 27 Feb Ash Monday Friday 14 Apr Good Friday (Orthodox/Katholic) Monday 17 Apr Easter Monday (Orthodox/Katholic) Monday 01 May Labour Day Holiday Monday 05 Jun Whit Monday Tuesday 15 Aug Assumption Day Monday 25 Dec Christmas Tuesday 26 Dec Second Day of Christmas Source: http://www.helex.gr/web/guest/market-securities-holidays