Ymni_isodion_ths_theotoku_me_thn_tessarakontame...

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

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. ymni_isodion_ths_theotoku_me_thn_tessarakontame...

: The primary hymn for November 21st is: : The Entrance of the Virgin Mary into the Temple

The "put together guide" for this specific combination of the feast and the 40-day period typically involves: ymni_isodion_ths_theotoku_me_thn_tessarakontame...