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.

681. And the seventh angel sounded.- That this signifies the influx of Divine Truth through the heavens from the Lord, and thence the consequent final changes is evident from the signification of sounding, in reference to an angel, as denoting the influx of Divine Truth from the Lord, and a consequent change in the lower parts, where the evil are (concerning this see above, n. 489, 502). To sound has this signification, because a trumpet and a horn signify Divine Truth about to be revealed, and also revealed, as may be seen above (n. 55, 262). The final change from the influx of Divine Truth from the Lord, is meant by the sounding of the seventh angel, because the number seven signifies what is full and final, as may be seen above (n. 20, 24, 257, 300, 486). The changes in the lower parts, where the evil are, caused by a stronger or milder influx of Divine Truth through the heavens from the Lord, and thus by various kinds of influx, have been amply treated of above (n. 413:2, 418, 419, 426, 489, 493); it is therefore unnecessary to say any more concerning them in this place. That the separation of the evil from the good, and the casting of the evil into hell, and many other changes, resulted from these various kinds of influx, may be seen in the places cited. From these things the signification of the seven angels sounding is now evident.