It is said that it is also called "The Happy Twenties". This is when the continents aré having a happy time.

roaring twenties, golden age, and dry decade

There are approximately 15 twenties in 300. 400 will have 20 twenties.

The 1920's were golden because everything was going well. WWI had just ended, factories were retooling for consumer goods (like cars), people were into having fun. This was all before the Great Depression, which started in 1929.

do you capitalize roaring twenties