When did Christ institute the Holy Eucharist?
Christ instituted the Holy Eucharist at the Last Supper, the night before He died.
When did Christ promise to institute the Holy Eucharist?After the miracle of the Loaves and Fishes at Capharnaum, Christ promised to institute the Holy Eucharist of His body and blood. John 6.
"The Bread that I will give, is My flesh for the life of the world." John 6:52.
"He that earth My flesh and drinkers My blood, hath everlasting life. " John 6:55.
Advanced Catechism of Catholic Faith, 1922