Traditional Culture Encyclopedia - Weather forecast - What does "time and sky" mean in ancient Chinese?

What does "time and sky" mean in ancient Chinese?

"Time" should mean "at that time" and "day" should be translated into sky, sky, weather, sky, etc. For example:

It's extremely cold-very cold.

Heavy rain-it rained heavily at that time.

If it is "the world at that time", it is "the world at that time".