Traditional Culture Encyclopedia - Weather forecast - What do you mean by sleepless night?

What do you mean by sleepless night?

The night has no end.

In other words, it is equivalent to a night that has not yet ended. If a night is not over, it is equivalent to the weather is not bright, and when it is not bright, it is equivalent to a state of night. For example, at this time, the time when the day is bright belongs to more than 6 o'clock, so before 6 o'clock, it is equivalent to the fact that the night is not over, which is equivalent to a state in which the night is still young.