8421. And it shall be in the sixth day. That this signifies in the end of every state, is evident from the signification of “day,” as being state (see n. 23, 487, 488, 493, 2788, 3462, 3785, 4850, 7680); and from the signification of “the sixth,” as being the end of a state. The reason why “the sixth day” denotes the end of a state is that “seven days” or “a week” signify an entire period, or a full state (n. 2044, 3845, 6508); whence the day preceding the seventh, that is, the sixth day, signifies the end of this state; and the day following, or the eighth day, signifies the beginning of the same state (n. 2044, 8400).

23. Nothing is more common in the Word than for “day” to be used to denote time itself. As in Isaiah:

The day of Jehovah is at hand. Behold, the day of Jehovah cometh. I will shake the heavens, and the earth shall be shaken out of her place, in the day of the wrath of Mine anger. Her time is near to come, and her days shall not be prolonged (Isaiah 13:6, 9, 13, 22).

And in the same Prophet:

Her antiquity is of ancient days. And it shall come to pass in that day that Tyre shall be forgotten seventy years, according to the days of one king (Isaiah 23:7, 15).

As “day” is used to denote time, it is also used to denote the state of that time, as in Jeremiah:

Woe unto us, for the day is gone down, for the shadows of the evening are stretched out (Jeremiah 6:4).

And again:

If ye shall make vain My covenant of the day, and My covenant of the night, so that there be not day and night in their season (Jeremiah 23:20, 25).

And again:

Renew our days, as of old (Lamentations 5:21).