These are the stichera and the Doxastikon (Glory) at the Aposticha of Great Vespers for the Feast of Palm Sunday. "Rejoice and be happy, O city of Zion . . . ." and "Today hath the grace of the Holy Spirit . . . ."
This Aposticha, Glory & Both now are sung at Great Vespers on the Feast of the Annunciation to the Most-Holy Theotokos, Tone/Mode 4. "In the sixth month . . . ," and "Today is the Annunciation . . . ."