The Feast of the Immaculate Conception celebrates belief in the Immaculate Conception of the Blessed Virgin Mary. It is universally celebrated on December 8, nine months before the feast of the Nativity of Mary, which is celebrated on September 8.
It is the patronal feast day of Spain, Korea, Portugal, Nicaragua, Brazil, the Philippines and the United States of America. It is celebrated by the Roman Catholic Church as well as a few other closely related Christian churches.
The feast was first solemnized as a Holy Day of Obligation on December 6, 1708 under the Papal Bull Commissi Nobis Divinitus by Pope Clement XI and is often celebrated with Holy Mass, parades, fireworks, processions, ethnic foods, and cultural festivities in honor of the Blessed Virgin Mary and is generally considered a “family day”, especially in many Catholic countries.
Originally from: 365 Days with Mary