September is a busy month in the liturgical calendar, with the liturgical new year marked on 1/14 September.
The first major feast to be celebrated in the liturgical new year is the Nativity of the Mother of God (21 September). The Holy Virgin Mary was born of her aged parents, Joachim and Anna. Her father was of the tribe of David and her mother of the tribe of Aaron, and so she was of royal blood from her father and priestly blood from her mother. By this, she foreshadowed Him who would be born of her as King and High Priest.
The Beheading of Saint John the Baptist (11 September) a Feast day established by the Church, is also a strict fast day because of the grief of Christians at the violent death of the saint. In some Orthodox cultures pious people will not eat food from a flat plate, use a knife, or eat food that is round in shape on this day.
Please see the timetable for more details.