Idaho Code § 73-108C
March 4 shall be designated as Idaho day. If March 4 falls on a Sunday, the following Monday shall be celebrated as Idaho day; and if March 4 falls on a Saturday, the preceding Friday shall be celebrated as Idaho day. The governor of the state of Idaho shall issue a proclamation each year marking Idaho day. The president pro tempore of the senate and the speaker of the house of representatives shall conduct appropriate ceremonies and programs on Idaho day to honor Idaho's heritage. The Idaho state historical society shall conduct appropriate activities and be encouraged to create exhibitions to commemorate Idaho day. The people of Idaho shall be encouraged to display the Idaho and United States flags on Idaho day. Idaho day shall not constitute a reason to close state and political subdivision offices.
Idaho Code § 73-108C