This article from the Occasional Digest explores the historical origins and religious significance of Corpus Christi, a Christian holiday honoring the Eucharist. The observance began in the thirteenth century due to the persistent efforts of Juliana of Liège, eventually gaining official recognition from the Papacy in 1264. Originally established as a Thursday celebration to mirror the events of the Last Supper, the feast is now observed by Roman Catholics, some Anglicans, and Western Rite Orthodox Christians. Beyond its theological roots, the text highlights how the day was historically marked by mystery plays and remains a mandatory occasion for Catholic bishops to lead services at their cathedrals. This overview situates the holiday within a broader modern news context, appearing alongside global headlines from June 2026.