Corpus Christi, also known as the Solemnity of the Most Holy Body and Blood of Christ, is celebrated on the Thursday following Trinity Sunday. This year, it is celebrated on the 8th of June. This feast day, translated as “The Body and Blood of Christ”, is a day to honour the sacred body of Jesus Christ.
The Feast of Corpus Christi was inspired by a Eucharistic Miracle in 1263. During a pilgrimage to Rome, St Peter of Prague stopped at St. Christina Church in Bolsena, Italy, to celebrate Mass. He was afflicted with doubt about the Eucharist and whether Jesus was truly present during the consecration of the Eucharist, and if the transubstantiation was truly real.
As he was consecrating the Eucharist, the host began to bleed. The blood dripped through his hands and onto the Corporal that is placed on the Altar. This was later deemed a miracle by Pope Urban IV after an investigation, and the relics from this miracle can be found at the Cathedral of Orvieto.
A year on from this, Pope Urban IV announced the Feast of Corpus Christi.
Read more about this Eucharistic Miracle on the website Blessed Carlo Acutis created, miracolieucaristici.org.