The scriptures indicate that Yahweh (Jehovah) was alone when He created the actual physical universe. (Isaiah 44:24) If so, not even the firstborn creature (Colossians 1:15) had yet been brought forth into existence at that time. The word "creature" or "creation", therefore, in Colossians 1:15 would mean living creation; similarly we find that "whole (or, all) creation" in Romans 8:23 does not include the stars, planets, sun, etc., nor even the angels, but rather all the human creation that has come through Adam. (Romans 5:12-19) The "world" in Romans 5:12 into which sin came through one man corresponds with the "world" that was made through Jesus as spoken of in John 1:3,10.
In Colossians 1:15, however, the creation includes more than just the human creation, since it includes dominions both visible and invisible and on earth and in heaven. (Colossians 1:16) This would therefore include the living spirit beings, of which Jesus was the firstborn creature. The time of the creation of the spirit creatures therefore must have been some time after the creation spoken of in Isaiah 44:24 but some time before the "beginning" of the world of mankind as spoken of in Genesis 1 & 2; Exodus 20:11; 31:17; Matthew 19:4; Mark 10:6; John 1:1-3; and Hebrews 1:10.