This clearly defines what is meant by "Between the Two Evenings."


twilight phases 


This shows the progression from sunset to dark. This is the time in the Bible called, 'Ben Ha Arbayim.'

What does it mean, Between the Two Evenings--between sunset and dark? Here is an astronomical explanation of that time. And you will see it is a band of time that on the earth there are two of them: one for the morning and one for the evening. And those bands of time circulate around the earth, because the earth rotates on its axis.