The "Miracle of the Sun" refers to an event that occurred on October 13, 1917, near Fátima, Portugal. Thousands of people gathered to witness a phenomenon described as the sun appearing to dance in the sky, changing colors, and emitting radiant light. This event followed a series of reported apparitions of the Virgin Mary to three shepherd children: Lúcia dos Santos, Francisco Marto, and Jacinta Marto. The event was seen as a fulfillment of the messages conveyed by the Virgin Mary during her apparitions, which included calls for prayer and penance. Many witnesses reported feeling a sense of awe and spiritual significance during the occurrence, leading to widespread belief in its miraculous nature.