The Feast of the Sacred Heart is a feast day in the liturgical calendar of the Roman Rite of the Catholic Church. According to the General Roman Calendar since 1969, it is formally known as the Solemnity of the Most Sacred Heart of Jesus and celebrated on the second Friday after Trinity Sunday (see § Date,below.) Some Anglican Franciscans keep the feast under the name of the Divine Compassion of Christ.

The Most Sacred Heart of Jesus is one of the most widely practised and well-known Catholic devotions, wherein the heart of Jesus Christ is viewed as a symbol of "God's boundless and passionate love for mankind". This devotion to Christ is predominantly used in the Catholic Church, followed by high church Anglicans, and some Western Rite Orthodox. In the Latin Church, the liturgical Solemnity of the Most Sacred Heart of Jesus is celebrated the third Friday after Pentecost. The 12 promises of the Most Sacred Heart of Jesus are also popular.