Presentation of the New Roman Calendar by Father Pierre Jounel, professor of the Superior Institute of Liturgy at the Catholic Institute of Paris and one of the most active contributors to the post-Conciliar liturgical reform (Rome, Holy See Press Office, May 9, 1969):... The revision of the list of saints inscribed in the general calendar of the Roman Church proceeds from the general principles just presented.
First, the list of saints commemorated before underwent a thorough historical investigation. Certain saints may be popular, due to legends created around their names, without one being able to ensure that they even existed, as Saint Christopher, Saint Barbara, Saint Catherine of Alexandria*. They were suppressed from the general calendar: the Christian people cannot be invited to a general prayer if not in truth. ...
Præsta quæsumus, omnipotens Deus: ut, qui beati Christophori Martyris tui, natalitia colimus, intercessione eius, in tui nominis amore roboremur. Per Dominum nostrum... (Collect for the Commemoration of Saint Christopher, Martyr - July 25, Missale Romanum, 1962: "Grant, we beseech Thee, O almighty God, that we, who venerate the natal day of blessed Christopher, Thy martyr, may, through his intercession, be strengthened in the love of Thy name.")
*The great martyr Saint Catherine of Alexandria would be included as an "Optional memorial" (Universal Calendar) in the Third Typical Edition of the New Roman Missal, 2002. [Does she really exist now? What about the "thorough historical investigation"?]