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.

3886. But it should be realized that variations in heartbeat and breathing from one heaven to another are manifold and that those variations are as many as the communities there. For those variations are determined by the differing states of thought and affection from one community to another, and those states are determined by the differing states of faith and love. But the general heartbeat and the general breathing of heaven is as has been described above. On yet another occasion I was allowed to observe the heartbeats of communities which belonged to the province of the back part of the head, to observe the heartbeat of each celestial community there and the heartbeat of each spiritual community. The heartbeats of the celestial communities were soundless and gentle whereas those of spiritual ones were strong and vibrating. There were five spiritual beats to every two celestial, for the heartbeat of the celestial communities flows into that of the spiritual, and in this ratio are emitted and pass into the natural creation. And marvel that it is, the speech of celestial angels is not something spiritual angels hear but something they perceive as a kind of heartbeat, the reason being that the speech of celestial angels is not intelligible to spiritual angels because it is produced through the affections which belong to love, whereas the speech of spiritual angels is produced through intellectual ideas, see 1647, 1759, 2157, 3343. And those affections belong to the province of the heart, but these ideas to that of the lungs.