The Tournament Of Roses parade began in the 1889. It brought an end to horse-pulled floats for the 31st annual event, so if my math is correct 1920 was the end for horsepowered floats.
the answer to this riddle is the tournament of roses parade by: Adam Schornak
114th Annual Tournament of Roses Parade - 2003 TV was released on: USA: 1 January 2003
Tournament of Roses Parade 1989 - 1989 TV was released on: USA: January 1989
110th Tournament of Roses Parade - 1999 - TV was released on: USA: January 1999
The cast of CBS Tournament of Roses Parade - 1986 includes: Larry Hagman as Himself - Host
CBS Tournament of Roses Parade - 1981 - TV was released on: USA: 1 January 1981
95th Tournament of Roses Parade - 1984 TV was released on: USA: 1 January 1984
99th Tournament of Roses Parade - 1988 TV was released on: USA: 1 January 1988
CBS Tournament of Roses Parade - 1984 TV was released on: USA: 1 January 1984
CBS Tournament of Roses Parade - 1985 TV was released on: USA: 1 January 1985
CBS Tournament of Roses Parade - 1986 TV was released on: USA: 1 January 1986
CBS Tournament of Roses Parade - 1995 TV was released on: USA: 1 January 1995