The foreword by John Behr to Jordan Daniel Wood’s The Whole Mystery of Christ begins by passing along a striking claim: “According to The Martyrology of Jerome, ‘On March 25, our Lord Jesus Christ was crucified, conceived, and the world was made.'”
This was the first I’ve heard of this potential coincidence. Is it true? I don’t know. But I do know that the Church celebrates the Feast of the Annunciation today. And there may be no better occasion for adding the Gloria back into the liturgy for this day during Lent.