6 Therefore, We decree that every year, wherever the Epiphany of the Lord iscelebrated, on that day a collection should be taken up to help in the projectWe have just outlined. We have chosen this day in preference to others because,as you well know, that is the day the Son of God first revealed Himself to thenations, when He showed Himself to the Magi. They were called "the firstfruits of our vocation and faith" by Our predecessor St. Leo the Great.Thus, We depend on the good hope to come that Christ the Lord will be moved by the love and prayers of the faithful, who have received thelight of truth. In a new testimony of praise, We pray that He extend His bountyfar and wide and that it flourish in happy prosperity. Meanwhile, We lovinglyimpart Our apostolic blessing on you, venerable brother, on the clergy, and onthe faithful entrusted to your pastoral vigilance. Given in Rome, at St. Peter's, on November 20, 1890, in the thirteenth yearof Our pontificate.
Source: Catholicae Ecclesiae (Vatican.va)