The 1920s was a time when jazz exploded into popular culture.
The 1920s was a great time for reading altogether, very fruitful.
The 1920s were an era of social and cultural rebellion.
The 1920s was a time when America saw a burst of creativity and innovation.
The 1920s were the time when Broadway ruled the world.
The 1920s...was the period of greatest achievement in American poetry.
The 1920s were a time of extraordinary achievement and energy in the arts.
The 1920s was a time of great change in America, socially and politically.
The 1920s were a great period of growth for Hollywood.