O Oriens

 21 December is the fifth day of the Great O Antiphons:

O Oriens (chant with neumes)

O Oriens,

splendor lucis aeternae, et sol justitiae:

veni, et illumina sedentes in tenebris, et umbra mortis.

Literally:

   O Rising Sun,

   splendor of eternal light and sun of justice,

   come, and illuminate those sitting in gloom and the shadow of death.

in the Household Book of Blessings and Prayers:

   O Radiant Dawn,

   splendor of eternal light and sun of justice:

   come and shine on those who dwell in darkness and in the shadow of death!

in “Veni Emmanuel”:

   Veni, veni o oriens!

   Solare nos adveniens,

   Noctis depelle nebulas,

   Dirasque noctis tenebras.

   Gaude, gaude, Emmanuel

   nascetur pro te, Israel.

in “O Come, O Come Emmanuel”:

   O come, Thou Dayspring, from on high,

   And cheer us by Thy drawing nigh;

   Disperse the gloomy clouds of night,

   And death’s dark shadows put to flight.

   Rejoice! Rejoice! Emmanuel

   Shall come to thee, O Israel.