On October 23, 1837, President Martin Van Buren and other government officials were seen in Frederick at Robert's Tavern.
On October 23, 1907, Judge James McSherry, Chief Judge of The Maryland Court of Appeals, died at his Frederick home.
On October 23, 1924, the Evangelical Reformed Church on West Church Street deeded its former burial grounds at West Second and North Bentz Streets to Frederick City and Frederick County. The site is now known as Memorial Grounds Park. Memorials to veterans of The Revolutionary War, The Civil War, World War I, World War II, the Korean War and the Vietnam War stand there.
On October 23, 2008, Officer Richard Mark Bremer, 39, of the Frederick City Police Department, was killed in a single vehicle crash in the 500 block of East South Street in Frederick while attempting a traffic stop. James Franklin Sweeney, Jr., of Frederick, was charged in the incident.