https://infogalactic.com/info/Feast_of_the_Sacred_Heart
> The Feast of the Sacred Heart (properly the Solemnity of the Most Sacred Heart of Jesus, Latin: Sollemnitas Sacratissimi Cordis Iesu) is a solemnity in the liturgical calendar of the Roman Catholic Church. It falls 19 days after Pentecost, on a Friday. ... The devotion to the Sacred Heart is one of the most widely practiced and well-known Roman Catholic devotions, taking Jesus Christ's physical heart as the representation of his divine love for humanity.
Traditional litany of the Sacred Heart prayer: http://www.catholictradition.org/Litanies/litany8.htm
