Pentecost in Eastern Christianity

Eastern Christianity celebrates Pentecost fifty days after Easter. This feast commemorates the descent of the Holy Spirit upon the Apostles and the followers of Jesus Christ.
Pentecost is one of the twelve Orthodox Great Feasts, second in rank only to Easter. The feast is celebrates with an All-night vigil, that begins on the eve of the feast. The Divine Liturgy is held on the day of Pentecost itself.
The feast of Pentecost lasts for three days: Trinity Sunday, Spirit Monday and the Third Day of the Trinity (Tuesday). During the feast the Orthodox churches are decorated with greenery and flowers, and green is chosen as the liturgical color. The clergy holds greenery and flowers in hands during the services and decorates homes with green branches of trees and flowers.
The clergy observes an extraordinary service Kneeling Prayer on the night of Pentecost. During the service everyone touches their forehead to the floor. Such prayer is forbidden in the churches from the day of Pascha to Pentecost.
Pentecost is a public holiday in Christian countries. Since it's always falls on Sunday, the next Monday after Pentecost is a day off.