The second Monday in October, to be known as Native Americans' Day, shall be observed in this state as a legal holiday. Native Americans' Day is dedicated to the remembrance of the great Native American leaders who contributed so much to the history of our state. Source: SL 1990, ch 7 , § 2.
Native Americans' Day established
SDCL § 1-5-1.2 — under TIME AND DATES.
SDCL § 1-5-1.2