Day
Like other descriptions of time in the Word, "a day" or a number of "days" describe a spiritual state rather than our natural concept of time. A spiritual "day" describes a state of mind or a state in our relationship with the Lord rather than a 12-hour or 24-hour span of natural time. "Day" describes a state in which we are turned toward the Lord, and are receiving light (which is truth) and heat (which is a desire for good) from the Lord.
Gods
The Lord is called "Jehovah" in the Bible when the text is referring to his essence, which is love itself. He is called "God" when the text is referring to the expression of that love -- which is called Divine Truth. References to other gods, both positive and negative, reflect that meaning. In positive cases -- such as when angels and people are called gods, or when the Lord is referred to as the God of gods -- those gods represent true ideas that come to us from the Lord. In negative cases -- such as when the people of Israel repeatedly adopt the gods of their neighbors -- those gods represent false and twisted thinking that attacks what is good and true.