Day Date Month Holiday
Friday 01 Jan New Year's Day
Wednesday 06 Jan Epiphany
Monday 14 Mar Ash Monday
Friday 25 Mar National Holiday - Good Friday (Catholic)
Monday 28 Mar Easter Monday (Catholic)
Friday 29 Apr Good Friday
Monday 02 May Easter Monday
Tuesday 03 May Labour Day Holiday
Monday 20 Jun Whit Monday
Monday 15 Aug Assumption Day
Friday 28 Oct National Holiday
Monday 26 Dec Second Day of Christmas
Source: http://www.helex.gr/web/guest/market-securities-holidays