The article discusses about the Laetare, fourth Sunday of Lent in the Roman Catholic liturgical calendar, with its counterpart in Advent being Gaudete Sunday. It further discusses that the text of an introit antiphon is generally a psalm from the St. Jerome's Vulgate Psalter in the "Gallican" version; Lætare, Jerusalem, a text from Prophet Isaiah; the liturgies of the Roman stational churches; and the church gathering and made a procession to the designated stational church for Mass.