John Calvin Coolidge, Jr. (July 4, 1872 – January 5, 1933) was the thirtieth President of the United States.
Famed for his taciturn New England attitude and no-nonsense approach to governance, Calvin Coolidge served from 1923 to 1929.
Coolidge published an autobiography in 1929 and wrote a syndicated newspaper column, "Calvin Coolidge Says," from 1930 to 1931.