Are you saying that Genesis 1:5 is therefore untrue?
No. Genesis was obviously not originally written in English. The Hebrew word eventually translated to "day" in Genesis was the Hebrew word "yowm", which can mean either "day", "year" or "a period of time". Genesis 1:14 and 1:5 are in conflict, unless a "day", as in the six days, is meant to be an unspecified period of time.