Look at the differences in these verses from different bible versions.
The Fourth Day: Sun, Moon, Stars (KJV Gen 1: 14-19)
14And God said, Let there be lights in the firmament of the heaven to divide the day from the night; and let them be for signs, and for seasons, and for days, and years: 15And let them be for lights in the firmament of the heaven to give light upon the earth: and it was so. 16And God made two great lights; the greater light to rule the day, and the lesser light to rule the night: he made the stars also. 17And God set them in the firmament of the heaven to give light upon the earth, 18And to rule over the day and over the night, and to divide the light from the darkness: and God saw that it was good. 19And the evening and the morning were the fourth day.
Then we have… (NIV 1:14-19)
And God said, “Let there be lights in the vault of the sky to separate the day from the night, and let them serve as signs to mark sacred times, and days and years, 15and let them be lights in the vault of the sky to give light on the earth.” And it was so. 16God made two great lights—the greater light to govern the day and the lesser light to govern the night. He also made the stars. 17God set them in the vault of the sky to give light on the earth, 18to govern the day and the night, and to separate light from darkness. And God saw that it was good. 19And there was evening, and there was morning—the fourth day
I think it has really brought home to me that when you are deeply studying God’s word and you are maybe seeking answers or maybe just simply taking a small portion of scripture and really trying to soak in the meaning. You know God always puts a sentence in for a reason. If you see a name you are not familiar with or seems to have a small role then look into that person a lot deeper. Ask, who was she? Why did God deem her important enough to be mentioned and not just mentioned but mentioned by her name.
Anyway, back to this scripture. I find you should always have the KJV to compare with whatever your bible translation of choice is. I find for me that most of the time I do understand the NIV better but when I compare a verse to KJV it can shine a new light on something. In the above comparisons the NIV and the bible I have even has a little different wording than this. It leaves me with the thought that the “signs in the heavens” are merely to differentiate between seasons. In the KJV it is clearly for “actual signs” AND for seasons and ….
To me it is another reason to take small bites and small portions and really study. Read a commentary with it. Look up words in the Hebrew or Greek and see how they came. There are terrific online tools for that and it really will open up a new world and experience when studying God’s wonderful word!