As we mentioned previously, 24 December is the Vigil of Christmas, which takes precedence over the Fourth Sunday of Advent. Thus, the Fourth Sunday of Advent is not commemorated this year using the 1962 missal.
The following day is, of course, the feast of the Nativity of our Lord, the first day of Christmas, on 25 December. A popular question in novus ordo circles is: What time does Midnight Mass begin? The novus ordo is not our concern, but if the question is about the traditional Latin Mass, the answer is clear: no earlier than midnight on 25 December. There is no permission to use the next calendar day's propers for the traditional Latin Mass on the evening before a Sunday or holy day, even at 11 p.m.
The liturgical law specifying the calendar day timeline for the use of TLM propers is found in the very beginning of the rubrics governing the 1962 liturgy, under part one, chapter two, number four:
4. Dies liturgicus est dies sanctificatus actionibus liturgicis, praesertim Sacrificio eucharistico et publica Ecclesiae prece, id est Officio divino; et decurrit a media nocte ad mediam noctem.






























