Depending on how you mean it, it could be: When is it 2 in the morning? (but I don't know why you'd be asking this question..) or when it is 2 in the morning.
It means: When is it two in the morning?
What color are your eyes? Marron, azul, verde, negro
"What color are your eyes?"
'Son las doce de la tarde' means 12 pm. (Time)