Ind. Code § 4-1-2-1
It is the intent of this chapter that state offices be open and able to conduct public business at all times during an eight and one-half (8 1/2) hour working day. Each employee shall work for a full seven and one-half (7 1/2) hours each working day and provision for a one (1) hour lunch period shall be provided each employee. Lunch hours of employees shall be staggered to permit the conduct of business at all times during a working day. Breaks shall be provided as set forth in IC 5-10-6-2. It shall be lawful for state offices to close their doors for business from the close of the working day each Friday or in the event Friday is a legal holiday, then from the close of the working day on the Thursday which immediately precedes such legal holiday, until the commencement of the working day on the next following Monday, or in the event Monday is a legal holiday, then until the commencement of the working day on the Tuesday which immediately follows such legal holiday; provided, however, that the state library may be kept open until noon Saturdays in the discretion of the Indiana library and historical board.
IC 4-1-2-1