On Sunday, June 23, 2024, Bishop Kassianos of Arabissos led the Divine Liturgy of the Holy Spirit at the church of the Theological School of Halki in honor of the Sunday of Holy Pentecost. Following the Divine Liturgy, the Great Vespers of the Holy Spirit took place, where Bishop Kassianos recited the prayers of the Kneeling.
A group of graduates from the Halki School, headed by Professor Nikolaos Xexakis, President of the Halki School Graduates Association in Athens, attended the service. Additionally, various pilgrims from different parts of Greece were also in attendance.