Since angels have no concept derived from time, as we in our world do, they have no concept of time or of the things that depend on time. They do not even know what all these temporal things are, like a year, a month, a week, a day, an hour, today, tomorrow, or yesterday. When angels hear these expressions from one of us (angels are always kept in contact with us by the Lord), they perceive states instead, and things that have to do with state. So our natural concept is changed into a spiritual concept with the angels. This is why expressions of time in the Word mean states, and why things proper to time like the ones listed above mean the spiritual things that correspond to them.
It is much the same for all the things that occur as a result of time, such as the four seasons of the year called spring, summer, autumn, and winter; the four times of day called morning, noon, evening, and night; our own four ages called infancy, youth, maturity, and old age; and with the other things that either occur as a result of time or happen in temporal sequence. When we think about them, it is from a temporal standpoint; but an angel thinks about them from the standpoint of state. Consequently, anything in them that is temporal for us changes into an idea of state for the angel. Spring and morning change into an idea of love and wisdom the way they are for angels in their first state; summer and noon change into an idea of love and wisdom as they are in the second state; autumn and evening, as they are in the third state; and night and winter into a concept of the kind of state that is characteristic in hell. This is why similar things are meant by these times in the Word (see above, Section 155). We can see from this how the natural concepts that occur in our thought become spiritual for the angels who are with us.
from Heaven and Hell, Sections 165, 166