In the Roman Missal we find the instruction, “In the Dioceses of the United States, the practice of covering crosses and images throughout the church from [the fifth] Sunday [of Lent] may be observed. Crosses remain covered until the end of the Celebration of the Lord’s Passion on Good Friday, but images remain covered until the beginning of the Easter Vigil.”
This is a photo from Saint Benedict's Parish in Chesapeake, Virginia, USA.