Fashion:

Flappers, evening dresses, boas, long pearl necklaces, fans, long pearl necklaces, headbands, feathers, cloche hats, mary jane shoes, bobs

Zoot Suits, black or white ties on a black shirt, spats, fedoras or gangster hats, English driving caps, slicked hair, plus fours

Culture:

Art Deco, Betty Boob, Speakeasy bars and prohibition "Bathtub Gin", Wireless radio, The zip, Model T Fords,

The Great Gatsby - F. Scott Fitzgerald 

Aviation - Howard Hughes

Silent Movies/Talkies - "The Jazz Singer".

Music:

Jazz, The Charleston, The Cotton Club, Ragtime Band, The Lindy Hop

Al Jolson, Duke Ellington, Irving Berlin, Fanny Brice

People of their time:

Gangsters -  Al Capone, Bugsy Siegel

Movie stars - Charlie Chaplin, Louise Brooks, Harold Lloyd, Laurel & Hardy

Fashion Designers - Coco Chanel