"We have seen his star in the east, and have come with gifts to adore the Lord."
-communion antiphon from the Roman Missal
Despite the previous post, in most places today would have been observed as either the second Sunday after Christmas or, in the U.S., as the Feast of the Epiphany (traditionally observed on January 6). Therefore if you had gone to Mass at a Catholic Church today in the U.S.A, the readings you would have heard would have been for the Epiphany. You can read today's readings below:
Readings for the Epiphany
The readings for this feast are the same for each year of the 3-year cycle of Sunday Readings, so one can read last year's reflection on the readings from Dr. Scott Hahn: Newborn King