Md. Const. XVII - Quadrennial Elections § 2

Except for a special election that may be authorized to fill a vacancy in a County Council or a vacancy in the office of chief executive officer or County Executive, under Article XI–A, Section 3 of the Constitution, elections by qualified voters for State and county officers shall be held on the Tuesday next after the first Monday of November, in the year nineteen hundred and twenty–six, and on the same day in every fourth year thereafter.