Indiana Code Title 1. General Provisions § 1-1-13-1

Sec. 1. The governor shall issue an annual proclamation setting apart the twenty-fifth day of February for the recognition of George Rogers Clark and designating that day as “George Rogers Clark Day.”  On this commemorative day, the Indiana Historical Bureau, the schools of Indiana and the citizens of Indiana are exhorted to celebrate the memory of George Rogers Clark by holding suitable exercises in fitting and patriotic observance of his great contributions to the cause of American Independence which include conquering and securing the Northwest Territory and establishing and promoting the first permanent American settlement in the Northwest Territory.