Me. Rev. Stat. tit. 1, § 150-L

In recognition of the service and sacrifice of Maine Indian tribes since the beginning of our nation in support for its liberties, and to recognize the thousands of years of Native American heritage and the culture Maine Indian tribes have contributed to the State, the Governor annually shall issue a proclamation designating March 20th as Native American Heritage and Culture Day, and the Governor shall urge the people of the State to observe this day in suitable places and with appropriate ceremony and activity.