The Bible says in Exodus 20:11 that God made everything in those six days, heaven and earth and everything in them. The angels had to be made during the first six days, although the Bible doesn't state when. Several references seem to say that the angels rejoiced when the earth's foundations were laid, they must have been created early in the week. See Job 38:4-7. This passage may be referring to the angels watching the original creation or it may be they were watching the establishing of the earth's new continental levels after the flood. I don't know for sure.
Dr. Kent Hovind