Sexagesima /sɛksəˈdʒɛsɨmə/, or, in full, Sexagesima Sunday, is the name for the second Sunday before Ash Wednesday in the Gregorian Rite liturgical calendar of the Roman Catholic Church, and also in that of some Protestant denominations, particularly those with Anglican and Lutheran origins.

The name "Sexagesima" is derived from the Latin sexagesimus, meaning "sixtieth," and appears to be a back-formation of Quinquagesima, the term formerly used to denote the last Sunday before Lent (the latter name alluding to the fact that there are fifty days between that Sunday and Easter, if one counts both days themselves in the total). Through the same process, the Sunday before Sexagesima Sunday was formerly known as Septuagesima Sunday, and marked the start of the Pre-Lenten Season which eventually became the time for carnival celebrations throughout Europe, this custom being later exported to places settled and/or colonized by Europeans. While Quinquagesima (50th day) is mathematically correct (allowing for the inclusive counting), Sexagesima and Septuagesima are only approximations (the exact number of days is 57 and 64 respectively). The earliest Sexagesima can occur is January 25 and the latest is February 28 (or February 29 in a leap year).

The Sacred Heart (also known as Most Sacred Heart of Jesus) is one of the most famous religious devotions to Jesus' physical heart as the representation of his divine love for humanity.

This devotion is predominantly used in the Catholic Church and among some high-church Anglicans and Lutherans. The devotion especially emphasizes the unmitigated love, compassion, and long-suffering of the heart of Christ towards humanity. The origin of this devotion in its modern form is derived from a French Roman Catholic nun, Marguerite Marie Alacoque, who said she learned the devotion from Jesus during a mystical experience. Predecessors to the modern devotion arose unmistakably in the Middle Ages in various facets of Catholic mysticism.

In the Roman Catholic tradition, the Sacred Heart has been closely associated with Acts of Reparation to Jesus Christ. In his encyclical Miserentissimus Redemptor, Pope Pius XI stated: "the spirit of expiation or reparation has always had the first and foremost place in the worship given to the Most Sacred Heart of Jesus". The Golden Arrow Prayer directly refers to the Sacred Heart.