Question: What is the American term for a day or event created mainly for commercial purposes, named after a card shop founded by Joyce Hall?
Sentence (from "Keithsburg Historic District"): Two of the district's buildings, the Commercial House and the Masonic Lodge, date to the 1840s and 1850s, when Keithsburg was the Mercer County seat; the remainder of the contributing buildings were built in the late 19th and early 20th centuries.
Relevant evidence: No