Ulixes, domum rediturus, dis gratias egit.

[john abshire]

this sentence and translation came from my text and answer key.
Ulixes, domum rediturus, dis gratias egit.
"Ullyses, about to return home, gave thanks to the gods."

shouldn't dis be diebus?, i.e. dative plural?

 

[Cinefactus]

dis is the dative plural of deus

diebus is the dative plural of dies

 

[john abshire]

dis is the dative plural of deus

diebus is the dative plural of dies

I see now.
if deus were not irregular, its dative plural would be deis.
(and i got my days (and gods) mixed up.)

 

[Cinefactus]

deis is also acceptable

 

[Dantius]

I see now.
if deus were not irregular, its dative plural would be deis.
(and i got my days (and gods) mixed up.)

 

[Pacifica]

Let me mention, because why not, that an alternate ablative (and so, presumably, dative as well) diibus is found in the Satyricon. But it's a rarity and would no doubt have been considered a mistake. The correct forms are as the others have said.