Born in Brooklyn, Day's family moved to San Francisco (where they survived the earthquake of 1906) and then to Chicago. After attending the University of Illinois, where she became involved in radical activism, she became a writer for socialist periodicals in New York. The birth of her daughter, Tamar, precipitated a series of events: Day's decision to baptize Tamar, the end of her common-law marriage, and, on December 28, 1927, her own entry into the Catholic Church.
Later, Day became acquainted with the French philosopher Peter Maurin, and together they founded the Catholic Worker newspaper and the movement that it inspired.
Autobiography