As you heard from Tim this week in his lesson on the Confession’s understanding of creation, there are a handful of alternative interpretations of Genesis 1,2 which our denomination considers credible. You likely remember hearing of the Gap Theory, the Day-Age Theory, the Framework Theory. If you click here you can read the PCA’s position paper on creation which speaks in more detail about those various theories–both their strengths and weaknesses. (You can find quite a number of denominational papers on issues of interest here at the PCA Historical Center site.)
Is it critical you reach a definitive conclusion as to Moses’ meaning about the “days” of creation? As Tim said, there are other doctrines that demand more settled conviction. But considering a variety of reasonable views on a given teaching of scripture is a still a worthy exercise.