Good Friday or Annunciation...which one trumps?

Question:  If I'm looking at things correctly, the Feast of the Annunciation and Good Friday fall on the same day this year. Which takes precedence? (I assume Good Friday?)

Answer:  Your assumption is correct, Good Friday trumps the Annunciation as far as the Liturgical Calendar is concerned.  In moments like these the Feast of the Annunciation is transferred to the nearest day possible being April 4th.  Easter and every day of the Easter Octave (which are all celebrated as one single celebration of Easter) trump the Annunciation and so does Divine Mercy Sunday.  So it is transferred to Monday April 4th and is not a Holy Day of Obligation for it is not on the list of Holy Days of Obligation in Canon 1246.  Further here is some information for Holy Days of Obligation in America:

In addition to Sunday, the days to be observed as holy days of obligation in the Latin Rite dioceses of the United States of America, in conformity with canon 1246, are as follows:

January 1, the solemnity of Mary, Mother of God
Thursday of the Sixth Week of Easter, the solemnity of the Ascension
August 15, the solemnity of the Assumption of the Blessed Virgin Mary
November 1, the solemnity of All Saints
December 8, the solemnity of the Immaculate Conception
December 25, the solemnity of the Nativity of Our Lord Jesus Christ

Whenever January 1, the solemnity of Mary, Mother of God, or August 15, the solemnity of the Assumption, or November 1, the solemnity of All Saints, falls on a Saturday or on a Monday, the precept to attend Mass is abrogated.

This decree of the Conference of Bishops was approved and confirmed by the Apostolic See by a decree of the Congregation for Bishops (Prot. N. 296/84), signed by Bernardin Cardinal Gantin, Prefect of the Congregation, and dated July 4, 1992.