Wrong timeline for the 12 days of Christmas in that article.
The twelve days of Christmas are from December 25 through January 8, the Epiphany -- arrival of the Three Kings to worship the child King.
Of course.
Epiphany falls on January 6th, not the 8th.
December 26th is the 1st day of Christmas, the 27th is the second, etc...
January 6th is thus the 12th day of Christmas.