The Missale Romanum (the Roman Missal), the ritual text for the celebration of the Mass, was first promulgated by Pope Paul VI in 1970 as the definitive text of the reformed liturgy of the Second Vatican Council. A second edition followed in 1975.
Pope John Paul II issued a revised version of the Missale Romanum during the Jubilee Year 2000. The English translation of the revised Roman Missal has been completed, and the Bishops of the United States approved the final sections of the text in November 2009.
27 November 2011 is the implementation date in the United States of America for the English translation of Roman Missal: Third Edition.