Latin Church, in the USA, USCCB Liturgcal Calendar states:
9. Since March 25, 2018 is Palm Sunday of the Passion of the Lord, the Solemnity of the Annunciation of the Lord, normally assigned to this date, is transferred to Monday, April 9, 2018.
DISCLAIMER: Catholic Answers has turned over the archive to Catholic-Questions.org and no longer owns, manages, or moderates the forums. For additional apologetics resources please visit www.catholic.com.