That's not true. Evolution is promoted by modernists like the Greek Archdiocese. It was proven in the book, "Genesis, Creation and Early Man," by Fr. Rose, that the theory of evolution is absolutely incompatible with Scripture and the teaching of the Church Fathers. I recommend you read this massive work and see all the citations and sources provided. Anyone who believes in evolution is not fully converted to the Orthodox faith, and most certainly does not have the mind of the Holy Fathers. It is the Holy Fathers of the Orthodox tradition who unanimously believed that the world was less than 6,000 years old at the time they lived.
Blessed Augustine believed that the world was less than 6,000 years old at the time he lived (City of God 12:10, p. 232). St. Theophilus (A.D. 115-181), sixth bishop of Antioch, and Julius Africanus (A.D. 200-245), believed that the world was 5,530 years old. (Theophilus,"To Autolycus," in "Ante-Nicene Fathers, vol. 2, pp. 118-21; Julius Africanus, "Five Books of Chronology," in "Ante-Nicene Fathers, vol.6, pp. 130-38).
The common Byzantine Christian reckoning (derived from the Septuagint), placed the date of creation at 5,508 B.C. (Rose, Genesis, Creation and Early Man, p. 236).
Russia inherited from the Byzantines the Orthodox Calendar based on the creation era. The date for the creation of the world was used by the Russians as the starting point for their empire. (see Riasanovsky, A History of Russia, p. 244).
Fr. Seraphim Rose writes: "even the most mystical Fathers" such as St. Isaac the Syrian accepted without question the common understanding of the Church that the world was created "more or less" in 5,500 B.C. (Rose, Genesis, Creation and Early Man, p. 236).
On the Roman Catholic side, a very powerful case against evolution from their own ancient sources is provided in "
THE DOCTRINES OF GENESIS 1-11: A Compendium and Defense of Traditional Catholic Theology on Origins", by Victor Warkulwiz