Day Date Month Holiday
Sunday 01 Jan New Year's Day
Friday 06 Jan Epiphany
Monday 27 Feb Clean Monday
Saturday 25 Mar 25th of March (national holiday)
Saturday 25 Mar Annunciation of the Lord
Friday 14 Apr Good Friday
Sunday 16 Apr Easter Sunday
Monday 17 Apr Easter Monday
Monday 01 May Labor Day / May Day
Monday 05 Jun Holy Spirit Monday
Tuesday 15 Aug Dormition of the Holy Virgin
Saturday 28 Oct The Ochi day
Monday 25 Dec Christmas Day
Tuesday 26 Dec Synaxis of the Mother of God
Source: https://www.timeanddate.com/holidays/greece/2017#!hol=9