This Sticheron, in particular from Matins of the Nativity of Christ at the Stichera at Psalm 50, is also sung, according to Galician Custom, instead of "We have seen the true Light," "May our mouths be filled," and "Blessed be the Name of the Lord" at Divine Liturgies during Christmas and its Post-festive period. It is in "Bulgarian" Tone 2.
There exists also a similar Sticheron for the feast of Theophany.
Anthology p. 761
lyrics
All Creation is filled with rejoicing today, for Christ is born of a virgin.