When the element of time is used to describe a setting, it means the events occurred in a certain time period.
By using the phrase, ''one fine evening'', the narrator is using a time element that shows that the setting of the story is in the evening which is a time period that denotes a certain amount of hours in the day thereby giving the reader a sense of the time the events of the excerpt occurred.
At the very basic level, synthesis refers to combining multiple sources and ideas. As a writer, you will use information from several sources to create new ideas based on your analysis of what you have read.