"Night and Day" by Virginia Woolf explores love, marriage, and women's roles in Edwardian society through the contrasting lives of Katharine Hilbery, a dreamy upper-class woman, and Mary Datchet, an independent suffragist. As they navigate personal choices and social expectations, the novel questions traditional ideas of romance and fulfillment. Woolf presents a nuanced portrayal of intellect, identity, and the complexities of modern womanhood in a rapidly changing world.