Green was born in Brampton, Derbyshire, England. Her mother had joined the LDS Church three years before Green's birth, but her father never joined. She emigrated to the United States with her mother and some of her siblings in 1889. Green was baptized into the LDS Church in 1891, and was by then living in Salt Lake City.[1]
After studying booking and accounting, Green began work as business manager for a Salt Lake medical clinic.[3]
In 1920, Green was made president of the YLMIA of the Granite Stake in Salt Lake City. She served in this position for the next 12 years, and oversaw the initial establishment of the Gleaner program.[4]
In 1932, at the age of 50, Green married Bryant S. Hinckley, whose wife, Ada, had died in 1930. At the time, five of Hinckley's 13 children were still living at home. At that time, Green was president of the stake YWMIA.[5] One of the children, Gordon B. Hinckley, later recalled that he and the other children were upset by their father's decision to remarry, but they eventually came to accept their stepmother: "I don't know that it was easy for her to step into our family, but she did it well. We all respected her. We all loved her".[6] In 1935, when Bryant Hinckley became president of the Northern States Mission based in Chicago, May Hinckley went with him and presided over the Primary Association, YWMIA, and Relief Society within the mission.
In 1940, May Hinckley was asked by church president Heber J. Grant to succeed May Anderson and become the third general president of the church's Primary Association. In her 3+1⁄2-year tenure, Hinckley introduced a revised curriculum, added a scripture-reading program for leaders and teachers, established a formal scriptural theme for Primary, and selected the official Primary logo, motto and colors.
Hinckley formed a committee that created lessons for use by Primaries in missions (as opposed to stakes). With energy rationing as a result of World War II, she oversaw the creation of more home-based Primary programs.[7]
^Janet Peterson and LaRene Gaunt, The Children's Friends: Primary Presidents and Their Lives of Service (Deseret Book Company: Salt Lake City, 1996), p. 42