Story takes place in weeks immediately following 1929 stock market crash (which occurred in late October), yet guests at East Coast estate where story is set have a pool party and wear summer clothes.
Billy De Wolfe mispronounces "Ziegfeld" as "Ziegfield".
As is customary in movies of the 1950s the hairdos are all wrong: both the men and the women wear fashions of 1950 instead of 1929.
The off stage scenes show cast members wearing what appears to be 1950 style clothing and bathing suits instead of 1929 styles. The finale of the show on stage during No ,No Nanette scenes is more in period character.