Septuagesima Sunday is a term used in the Christian liturgical calendar, which marks the third Sunday before Ash Wednesday. Synonyms for this day include Pre-Lent Sunday, Third Sunday before Lent, and Seventieth Day before Easter. The word 'Septuagesima' is derived from the Latin meaning 'seventieth'. Other related terms include Sexagesima Sunday (Second Sunday before Lent) and Quinquagesima Sunday (First Sunday before Lent). These Sundays form a period of preparation for the Lenten season and are marked by themes of introspection, repentance, and renewal. While the terminology may differ, the overarching message remains the same as Christians prepare for the season of Lent and the celebration of Easter.