Mo. Rev. Stat. § 311.298

When January first, March seventeenth, July fourth, or December thirty-first falls on Sunday, and on the Sundays prior to Memorial Day and Labor Day and on the Sunday on which the national championship game of the national football league is played, commonly known as "Super Bowl Sunday", any person having a license to sell intoxicating liquor by the drink may be open for business and sell intoxicating liquor by the drink under the provisions of his license on that day from the time and until the time which would be lawful on another day of the week, notwithstanding any provisions of section 311.290 or any other provision of law to the contrary.