On Sunday, June 20, Orthodox believers celebrate the Day of the Holy Trinity.
The Day of the Holy Trinity, or Pentecost, also called the Church's birthday, was instituted by the apostles themselves.
Holy Trinity Day is one of the great Christian holidays, which glorifies God the Father, God the Son and God the Holy Spirit.
On this day, the Holy Spirit descended on the disciples of Christ and filled them with all the gracious spiritual gifts - they were transformed, and the Holy Spirit became their constant inspiration and guide. From that time on, the apostles courageously and fearlessly, with great boldness, began to preach Christ crucified and risen from the dead, and the Church of Christ began to grow and multiply first among the Jews in Palestine and then among the Gentiles throughout the world - "to the ends of the earth." ”(Acts 1: 8).
It has long been customary to decorate temples and homes with greenery (tree branches), plants and flowers on Pentecost. This custom has been observed since the days of the Old Testament Church on the day of Pentecost (Lev. 23: 10-17; Num. 28:26). Evidently, the room of Zion was removed, where the Holy Spirit descended on the apostles on the day of Pentecost. Since then, according to the custom of the apostles and Christians, temples and houses are decorated with green branches and flowers. These ornaments are also reminiscent of that sacred oak grove where Patriarch Abraham was honored to receive the Triune God under the guise of three travelers (Gen. 18: 1).
At the same time, the ever-renewed trees and flowers of nature point to the mysterious renewal of the souls of believers by the power of the Holy Spirit and serve as a reminder and call to spiritual renewal and to life in Christ, our Lord and Savior.