May 12, 1543: British Parliament prohibits any "women or artificer's prentices, journeymen, servingmen of the degree of yeoman, or under, husbandmen or labourers to read the New Testament in English."
May 12, 1792: Father of Modern Missions William Carey publishes his highly influential (though deplorably titled) book on the importance of evangelism, An Enquiry into the Obligations of Christians, to use means for the Conversion of the Heathens in which the Religious State of the Different Nations of the World, the Success of Former Undertakings, and the practicability of Further Undertakings, are Considered (see issue 36: William Carey).
May 12, 1861: Julia Ward Howe's "Battle Hymn of the Republic," published in the Atlantic Monthly three months earlier, is first performed at Fort Warren, Massachusetts, during a flag-raising ceremony for new Union recruits (see issue 33: Christianity and the Civil War).