Arcana Coelestia # 23
23. Nothing is more common in the Word than for the word 'day' to be used to mean the particular time at which events take place, as in Isaiah,
The day of Jehovah is near. Behold, the day of Jehovah comes. I will make heaven tremble, and the earth will be shaken out of its place, on the day of My fierce anger. Its time is close at hand, and its days will not be prolonged. Isaiah 13:6, 9, 13, 22.
And in the same prophet,
Her antiquity is in the days of antiquity. On that day Tyre will be forgotten for seventy years, like the days of one king. Isaiah 23:7, 15.
Since 'day' stands for the particular time it also stands for the state associated with that particular time, as in Jeremiah, Woe to us, for the day has declined, for the shadows of evening have lengthened! Jeremiah 6:4
And in the same prophet,
If you break My covenant that is for the day and My covenant that is for the night, so that there is neither daytime nor night at their appointed time. Jeremiah 33:20, 25.
Also,
Renew our days as of old. Lamentations 5:21.
Arcana Coelestia # 3487
3487. The words which come before these and which were explained in 3353-3356 are a description of the first state of the perversion of the Church - a state when people will cease to know any longer what goodness is and what truth is, and will start to argue with one another about these, with the result that falsities arise. The words in the present section however describe the second state of the perversion of the Church - a state when people will treat goodness and truth with contempt and will also loathe them, so that faith in the Lord will breathe its last, doing so by degrees as charity comes to an end.