Our Lady of Guadalupe, 12 December

Our Lady of Guadalupe falls on the twelfth of December, the date this rule records, commemorating a reported Marian apparition to the Indigenous convert Juan Diego at the hill of Tepeyac near Mexico City in fifteen thirty one, and the image said to have appeared miraculously on Juan Diego's cloak, now venerated at the Basilica of Guadalupe, became one of the most significant devotional images in the Catholic world and a central symbol of Mexican national and religious identity in the centuries since. The feast's own cited historical source is unusually candid about the limits of the documentary record, since the earliest known written accounts of the apparition narrative postdate the reported event by roughly a century, a gap that has made the story's precise origins a genuine subject of historical inquiry rather than settled fact.

That scholarly caution does not diminish the devotion's later historical weight. The image and its feast became inseparable from the growth of Catholicism among Indigenous and mixed heritage populations across colonial Mexico, offering a devotional figure whose iconography drew on both European Marian tradition and Indigenous visual and religious vocabulary, and Our Lady of Guadalupe was later named patroness of the Americas by the Catholic Church. The date remains a major pilgrimage occasion at the Mexico City basilica, one of the most visited Catholic shrines anywhere, and the feast's continued importance sits somewhat apart from the more cautious historical question of exactly how the earliest written record of the apparition came together a century after the fact.