Ymni_isodion_ths_theotoku_me_thn_tessarakontame... Link

: Many parishes perform a Divine Liturgy every day for 40 days leading up to Christmas (Nov 15 – Dec 25). The hymns of the "Isodia" are prominent during the first week of this journey.

: The Entrance of the Virgin Mary into the Temple. This is when the musical tone of the services shifts toward Christmas.

The phrase refers to the Hymns of the Entrance of the Theotokos (Isodia tes Theotokou) combined with the Tessarakontameron (the 40-day Christmas Lent period or "Sarantaleitourgo") in the Greek Orthodox tradition. ymni_isodion_ths_theotoku_me_thn_tessarakontame...

: The primary hymn for November 21st is:

If you are looking for a specific or PDF booklet with this exact filename for a church choir, these are often found on Greek digital archives like Psaltologion or Analogion. : Many parishes perform a Divine Liturgy every

In the Orthodox liturgical calendar, the Feast of the Entrance of the Theotokos (November 21st) serves as the "threshold" for the Christmas season. It is on this day that the Church begins singing the Katavasies of Christmas, "Christ is Born, Give ye Glory!" Guide to the Hymns & Traditions

The "put together guide" for this specific combination of the feast and the 40-day period typically involves: This is when the musical tone of the

: Incorporating the daily commemoration of saints alongside the pre-feast hymns of the Nativity.