Answered by Legionary of Christ Father Edward McNamara, professor of liturgy and sacramental theology and director of the Sacerdos Institute at the Pontifical Regina Apostolorum university.
Q: The General Instruction of the Roman Missal mentions the option of celebrating, on weekdays in ordinary time, “the Mass of any saint inscribed in the Martyrology for that day” (GIRM No. 355.c). Among those listed in the martyrology are a number of Old Testament “saints” (cf. Catechism of the Catholic Church, 61), for example, Melchizedek (August 26), Abraham (October 9), Moses (September 4) and prophets such as Hosea (October 17) and Joel (October 19). Could such persons be celebrated using Mass texts from the Common of Holy Men and Women? — J.D., Wagga Wagga, Australia
A: This is quite an intriguing question, and I hope my response will do it justice.