Hello Deborah - welcome to the boards.
I'm sorry no-one has replied to your question - can anyone help?
If it's any consolation to you, my lo had exactly the same problem at that age, but I can't remember what we did to correct it :roll: . I think, though, that consistency is the key - try to get a good routine going, especially in the evening, so that he eventually cottons on to the fact that it's night time.
Congratulations on your little boy!