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 #4617
4617. 'A hundred and eighty years' means the nature of this state. This becomes clear from the fact that all numbers in the Word have spiritual realities as their meaning, see 482, 487, 575, 647, 648, 755, 813, 1963, 1988, 2075, 2252, 3252, 4264, 4495. 'A hundred and eighty years' accordingly means the nature of the reality, that is, of the state, which is being dealt with. 'A hundred' means a complete state, see 2636, and 'eighty' temptations, 1963, here by means of temptations - in addition to many other things which cannot be known. Numbers obtain their meanings from the simpler numbers of which they are the products when the simpler are brought together or multiplied, as with the number here which is the product of twelve and fifteen and also of others yet simpler than these.