Sunday 01 Jan New Year's Day
Friday 06 Jan Epiphany
Monday 27 Feb Ash Monday / Clean Monday (Kathara Deftera)
Sunday 26 Mar Independence Day
Friday 13 Apr Orthodox Good Friday
Sunday 15 Apr Orthodox Easter (Pascha)
Monday 16 Apr Orthodox Easter Monday
Tuesday 01 May Labour Day
Sunday 03 Jun Orthodox Whit Sunday
Monday 04 Jun Orthodox Whit Monday
Wednesday 15 Aug Assumption Day (Dormition)
Sunday 28 Oct Ochi Day (National Day)
Tuesday 25 Dec Christmas Day (Christougenna)
Wednesday 26 Dec Second Day of Christmas
Source: http://athens.angloinfo.com/countries/greece/pub_hols.asp