"bad night"

Translation: špatná noc

[ettoreg60]

Then I guess 'noc' is feminine, right?
So why is 'good night' translated as 'dobrou noc' instead of 'dobrá noc'?

[endless_sleeper]

Yes, noc is feminine.

I usually explain it like this: dobrou noc uses accusative dobrou because it's a shortening of Přeji ti/vám dobrou noc. 'I wish you (sg/sg formal+plural) a good night.' You use accusative for the object of a verb.

[ettoreg60]

Great, now it does make sense to me!
Thank you!

[CassyL88]

what does sg stand for please? Im new here and trying to understand it all

[VladaFu]

singular https://en.wikipedia.org/wiki/Grammatical_number#Singular_versus_plural

[JLZoUa]

What does accusative mean? And what is object of an accusative?

[VladaFu]

The grammatical case used for direct objects. I suggest waiting for a few lessons, it will come soon. Or you can look into https://en.wikipedia.org/wiki/Grammatical_case

[FrancesFar7]

Zlá noc? Why not?

[VladaFu]

"zlá" as "bad" is Slovak, not Czech