A Seven Week Advent? Yes! There was a time when liturgical churches used seven weeks of preparation for Christmas to match the seven weeks in Lent leading to Easter.
This tradition remained in the Orthodox churches–Russian, Greek, etc.
Today is the first day of a Seven Week Advent and begins with this collect:
Eternal God, your Word of wisdom goes forth and does not return empty: Grant us such knowledge and love of you that we may perceive your presence in all creation and every creature; through Jesus Christ our Lord, who with you and the Holy Spirit lives and reigns, now and forever. Amen.
Frank and I created a booklet for a nightly service for a Seven Week Advent, which can be found here if you are interested: Seven Week Advent
You can also find more resources here: The Advent Project