HANKS TO THE FACEBOOK PAGE of Msgr. Guido Marini, which has more than 100,000 followers, we see that Pope Francis said Mass “ad orientem” on the Feast of the Baptism of the Lord, 12 January 2014:

See also this.
Pope Saint Paul VI (3 April 1969): “Although the text of the Roman Gradual—at least that which concerns the singing—has not been changed, the Entrance antiphons and Communions antiphons have been revised for Masses without singing.”