: Starting on November 21, the choir or chanter transitions from the standard hymns to the beautiful Christmas melodies during the Orthros (Matins) service.
: 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. ymni_isodion_ths_theotoku_me_thn_tessarakontame...
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. : Starting on November 21, the choir or
: Incorporating the daily commemoration of saints alongside the pre-feast hymns of the Nativity. : Starting on November 21