Today is the Solemnity of the Annunciation of the Lord. Since the prescribed date, March 25th, fell during Holy Week this year the feast was transferred to the Monday following the Second Sunday of Easter.
The following are complete English propers for this feast, with pointed psalm verses, as found in the Lumen Christi Missal:
Drop down dew from above, you heavens,
and let the clouds rain down the Just One;
let the earth be opened
and bring forth a Savior.
(Entrance Antiphon, Annunciation)