'We . . . have come to pay him homage.' The Epiphany of the Lord.
The Adoration of the Magi, Velázquez, 1619
Museo del Prado, Madrid [Web Gallery of Art]
Readings for the Solemnity of the Epiphany
Readings (New American Bible: Philippines, USA)
Readings (Jerusalem Bible: Australia, England & Wales, India [optional], Ireland, New Zealand, Pakistan, Scotland, South Africa)
The readings above are used both at the Vigil Mass and at the Mass during the Day. Each Mass has its own set of prayers and antiphons.
In countries where the Epiphany is observed as a Holyday of Obligation on 6 January, eg, Ireland, the Mass of the Second Sunday after the Nativity is celebrated. The same readings are used in Years A, B, C:
Readings (Jerusalem Bible)
Alleluia and Gospel for the Epiphany
Vidimus stellam eius in Oriente,
We have seen his star in the East,
et venimus cum muneribus adorare Dominum.
and have come with gifts to adore the Lord.
The same text (cf. Matthew 2:2), without 'Alleluia, alleluia,' is used as the Communion Antiphon at the Mass during the Day.