The Kings, the Shepherds and the Angels sing as they leave the Stable, having seen the Baby Jesus. All sing the refrain, with Soprano, Tenor, Alto and Bass, respectively, taking each verse. I had difficulty with the alternating 2/2, 6/4 bars until I changed bar 7 to 5/4 and the rhythms suddenly made sense.

Gaudete, gaudete
Christus est Natus ex
Maria virgine.
Gaudete, gaudete
Christus est Natus ex
Maria virgine.
Gaudete.

Tempus adest gratiæ
Hoc quod optabamus,
Carmina lætitiæ
Devote reddamus.

Deus homo factus est
Natura mirante,
Mundus renovatus est
A Christo regnante.

Ezechielis porta
Clausa pertransitur,
Unde lux est orta
Salus invenitur.

Ergo nostra cantio,
Psallat iam in lustro;
Benedicat Domino:
Salus Regi nostro.

Translated:

Rejoice, rejoice,
Christ is born of
The Virgin Mary.
Rejoice, rejoice,
Christ is born of
The Virgin Mary.
Rejoice.

The time of grace has come
That we have desired;
Let us devoutly return
Joyful verses.

God has become man,
And nature marvels;
The world has been renewed
By Christ who is King.

The closed gate of Ezechiel
Has been passed through;
Whence the light is born,
Salvation is found.

Therefore let our song
Now be sung in brightness
Let it give praise to the Lord:
Greeting to our King.

<center><table border=1><tr><td>Gaudete
Gaudete.not (40.1 k)</td></tr></table></center>

The song was a No. 11 hit for the English electric-folk group Steeleye Dan in 1974.