Clement Moore died at his Newport home on July 10, 1863, but "The Gilded Age" Season 3 is set in 1884. So did the series' writers flub the reference?
Warning: SPOILERS for The Gilded Age Season 3, Episode 2 - "What The Papers Say." The Gilded Age season 3 quickly introduced some big surprises, including a concerning illness for Peggy Scott.