It is no exaggeration to say that Easter in Greece is more celebrated than Christmas. It is the biggest religious holiday in Greece. If you are fortunate enough to be traveling in Greece during Easter, you'll have the opportunity to experience the traditions of the Greeks during Easter time.
There are many traditions that the Greeks practice during Easter, such as the preparation of the Greek Easter Lamb (arni) and the dying of eggs. Bright Easter eggs are an important symbol of Greek orthodox practice. Easter is also considered to be a time to reflect and time for family bonding, so don't waste your time doing nothing during this religious holiday.
As the Greeks say, Καλό Πάσχα!