"Ben gece uyurum."

Translation: I sleep at night.

[SrijanH]

where is the 'at'?

[AlexinNotTurkey]

Turkish doesn't use it in this expression. :)

[lucaturilli]

You can use 'geceleyin' instead of 'gece'. That depends on your choice.

[RumenT]

As well as "akşamleyin", "öglenleyin" and "sabahleyin". I think it's just different for times of day.

[lucaturilli]

In fact there a few more exceptions such as 'kışın' and 'yazın', but not a lot.