Presidency of Ronald Reagan
Ronald Reagan's tenure as the 40th president of the United States began with his first inauguration on January 20, 1981, and ended on January 20, 1989. Reagan, a Republican from California, took office after defeating the Democratic incumbent president Jimmy Carter and independent representative John B. Anderson in the 1980 presidential election.
Source: Wikipedia — Presidency of Ronald Reagan (CC BY-SA 4.0)