| April 1935 | Dr. Silkworth told Bill to quit preaching at drunks & tell them of obsession & allergy. |
| April 1950 | Saturday Evening Post article “The Drunkard’s Best Friend” by Jack Alexander. |
| April 1958 | The word “honest” dropped from AA Preamble, “an honest desire to stop drinking”. |
| April 1966 | Change in ratio of trustees of the General Service Board; now two thirds (majority) are alcoholic. |
| April 1970 | GSO moved to 468 Park Ave. South, NYC. |
| April 1, 1939 | Publication date of Alcoholics Anonymous, AA’s Big Book. |
| April 1, 1940 | Larry J. of Houston, wrote “The Texas Prayer”, used to open AA meetings in Texas. |
| April 1, 1966 | Sister Ignatia died. |
| April 2, 1966 | Harry Tiebout, M.D. died. |
| April 3, 1941 | First AA meeting held in Florida. |
| April 3, 1960 | Fr. Ed Dowling, S.J., died. He was Bill W’s “spiritual sponsor.” |
| April 7, 1941 | Ruth Hock reported there were 1,500 letters asking for help as a result of the Saturday Evening Post Article by Jack Alexander. |
| April 10, 1939 | The first ten copies of the Big Book arrived at the office Bill and Hank P shared. |
| April 11, 1938 | The Alcoholic Foundation formed as a trusteeship for A.A. (sometimes reported as May 1938) |
| April 11, 1941 | Bill and Lois finally found a home, Stepping Stones in New Bedford. |
| April 16, 1940 | A sober Rollie H. catches the only opening day no-hitter in baseball history since 1909. |
| April 16, 1973 | Dr. Jack Norris presented President Nixon with the one millionth copy of the Big Book. |
| April 19, 1940 | The first AA group in Little Rock, Arkansas, was formed. First ‘mail order’ group. |
| April 19, 1941 | The first AA group in the State of Washington was formed in Seattle. |
| April 22, 1940 | Bill and Hank transfer their Works Publishing stock to the Alcoholic Foundation. |
| April 23, 1940 | Dr. Bob wrote the Trustees to refuse Big Book royalties, but Bill W insisted that Dr. Bob and Anne receive them. |
| April 24, 1940 | The first AA pamphlet, “AA”, was published. |
| April 24, 1989 | Dr. Leonard Strong died. |
| April 25, 1939 | Morgan R interviewed on Gabriel Heatter radio show. |
| April 25, 1951 | AA’s first General Service Conference was held. |
| April 26 or May 1, 1939 | Bank forecloses on 182 Clinton Street. |
| April 30, 1989 | Film “My Name is Bill W.” a Hallmark presentation was broadcast on ABC TV. |