 Elements unique to the ELCA have been updated from the "Lutheran Book of Worship" to reflect changes resulting from the publication of "Evangelical Lutheran Worship" in 2006.The elements of the calendar unique to the LCMS have also been updated from "Lutheran Worship" and the "Lutheran Book of Worship" to reflect the 2006 publication of the "Lutheran Service Book".The basic element to the calendar is Sunday, which is a festival of Jesus’ resurrection.