The Feast of the Immaculate Conception, known as Dia de la Immaculada Concepcion in Peru, is a significant religious holiday that is celebrated throughout the country. The day venerates the belief in the sinless lifespan and Immaculate Conception of the Virgin Mary, mother of Jesus Christ. This deeply spiritual holiday falls on the 8th of December each year and is a public holiday in Peru, with most businesses opting to close as a mark of respect.

Rituals and celebrations vary across different regions of the country, yet a common thread is the large processions held in honor of the Virgin Mary. The streets are decorated with flowers and banners; statues of the Virgin Mary are also carried through towns, accompanied by music and dance. In some places, such as Cusco, the day is also marked by folk dances and bullfights, as part of the traditional festival called the 'Corrida de Toros'.

The Feast of the Immaculate Conception is a deeply revered day in Peru and marks a moment for devout Catholics to reaffirm their faith. It is also an occasion for families to come together in celebration. While it may be a religiously inclined holiday, it also provides a glimpse into the rich culture and traditions of the Peruvian people. The festive air, the cultural performances, and, most prominently, the spiritual reverence of the day make this holiday one of the most significant in the Peruvian calendar.