When were the stars made?

When were the stars made?
On the fourth day of creation, after the earth was made.	Before the earth was made.
Gen.1:16-19 He made the stars also. And God set them in the firmament of the heaven.... And the evening and the morning were the fourth day.	Job 38:4-7 Where wast thou when I laid the foundations of the earth? ... When the morning stars sang together.