Synecdoche is a figure of speech where a part of something is used to represent the whole, or vice versa.
In this case, "time" represents the entire passage of time or a period of time. "A green orchard" represents a place or a feeling associated with that time.
The sentence evokes a sense of idyllic peace and tranquility, likely associated with a spring or summer season. It leaves the reader to imagine a specific time of year in a green orchard, perhaps a sunny afternoon or a gentle breeze.