When is the beginning of the "modern era" to you?

I’ve got the 1890s as well because I think it’s when most Americans would look at it and recognize it. We’ve got skyscrapers, elevators, automobiles, telephones, and professional baseball. It’s the beginning of modern America.

1937…first electric guitar patent.

Funnily, I started this thread with the same idea in 2018. This newer thread is worthwhile.