when was the tv show bonanza on

Bonanza was on NBC from September 12, 1959, to January 16, 1973. It ran for 14 seasons and became one of TV’s longest-running westerns.

Quick Scoop

• Premiere: September 12, 1959.

• Finale: January 16, 1973.

• Network: NBC.

• Total run: 14 seasons.

Bonanza was especially popular after moving to Sunday nights in 1961, which helped make it a long-running classic.