Wash. Const. art. VI, § 8

ELECTIONS, TIME OF HOLDING. The first election of county and district officers not otherwise provided for in this Constitution shall be on the Tuesday next after the first Monday in November 1890, and thereafter all elections for such officers shall be held biennially on the Tuesday next succeeding the first Monday in November. The first election of all state officers not otherwise provided for in this Constitution, after the election held for the adoption of this Constitution, shall be on the Tuesday next after the first Monday in November, 1892, and the elections for such state officers shall be held in every fourth year thereafter on the Tuesday succeeding the first Monday in November. Cf. Art. 27 Section 14.