As a religious nation, Greek Orthodox Easter is a week-long celebration that includes a series of festivities. The Holy Week, or Megali Evdomada, is brimming with symbolic events, festivities, and traditions followed by the whole nation, though the serious business begins around Holy (or Maundy) Thursday.
On Holy Thursday
This day is when the Service of the Holy Passion takes place. Preparations for the Resurrection festivities start on that day.