Sentence:  Cows were kept in backyard barns , boys were hired to drive them to and from the pasture on the edge of town , and familiar to the ear , morning and <WSD>evening</WSD> , were the boys ' coaxing voices , the thud of hooves , and the thwack of a stick on cowhide . 
Meaning of the word marked with <WSD> tags:  the latter part of the day (the period of decreasing daylight from late afternoon until nightfall)