Quote Originally Posted by Valda View Post
Gotcha I just thought since she is female to use было.. but I guess it depends on "what is good" (like morning in our case) and not "who" is good.
Yes! In the Russian sentence "У тебя было хорошее утро" the subject is "утро", and it is neuter. So, the verb agrees with the subject: "Утро было".

In the English sentence "You had a good morning" the subject is "you".

But note: there is no "had" in the Russian version! There is "was" instead. Think of it this way: "A good morning was at you".