Dé

Proper noun

 * 1) * The translation of Silent Night into Irish) begins:
 * "ga"
 * "ga"

- Oíche chiúin, oíche Mhic Dé

Etymology 2
Originally the dative of.

Preposition

 * 1) on

Usage notes
is not used with, which by itself is both the noun “Thursday” and the adverb “on Thursday”.