In the 1962 Breviarium S.O.P., the ferial days of Christmastide (January 2-5) contained no feast days of saints or blesseds, so the ferial day was prayed on each of those days, unless one of them fell on Sunday. The liturgical rank of these ferial days was IV Class. Of course, in previous editions of the Breiary, January 2 was the feast of Blessed Stephana Quinzani and January 3 was the feast of St. (then blessed) Zedislavae Berkianae. On my calendar, I follow Fr. Augustine Thompson rule of including the Dominican saints who were merely blessed in the older calendar.
So I add St. Zedislavae back into the calendar, even though she was removed in the 1962 revision.
The Christmastide ferial office is is prayed as follows: