Good Friday (29 April): The celebration date changes every year. The day commemorating Jesus Christ's crucifixion.
Holy Saturday (30 April): The celebration date changes every year. The last day of Holy Week and of Lent. At midnight the Resurrection of Christ is celebrated.
Easter Sunday (1 May): The celebration date changes every year. The most important Christian celebration, celebrating the Resurrection of Christ.
International Workers day (1 May): Dedicated to the Chicago workers riot in May 1886 demanding an 8-hour work day and better working conditions.
Easter Monday (2 May): The celebration date changes every year. The second day of Easter.
Dormition of Virgin Mary (15 August): One of the most important orthodox celebrations, celebrating the passing and burial of Virgin Mary, with glorious ceremonies in many parts of Greece.
Feast of Saint Dionysius (24 August & 17 December): Twice a year Zakynthos honours its protector, Saint Dionysius. The first festival takes place on August 24 to mark the transportation of the Holy Body from the islands of Strofadia to Zakynthos, which happened in 1717, and the second on December 17, honours the Dormition of the saint which took place in 1622. Both of these festivals are characterised for their unique glory and each lasts for three days (23-26 August and 16-19 December).
"No" Day (28 October): On this day the Greeks celebrate dictator Ioannis Metaxas's refusal, on 28th October 1940, regarding Italian claims, leading to Greece taking part in WWII.
Christmas (25 December): One of the most glorious celebration of Christianity, celebrating the birth of Jesus Christ.