Wednesday of Holy Week
Returning to the Papal Basilica of St. Mary Major dedicated to the Virgin Mary, Romans surely love this original structure preserved since the 5th century.
The basilica was formerly known as the Basilica of Our Lady of the Snow because snow fell upon this site on a hill to indicate the exact dimension of the church to Pope Liberius. The day was recorded as August 5, and so it has been celebrated as the Feast of Our Lady the Snow.
This is most likely a legend, but if you attend Mass therein on this feast day, you will see a show of fake snow scattered from inside the dome of the basilica during Mass. Yes, the celebration of the Eucharist can come in 4D too!