On April 30, 1939, the World's Fair opening in New York. As the above poster indicates, it was a forward-looking fair, almost riffing on the images bubbling in sci-fi literature and movies.
Actually, if that one doesn't do it, consider the one on the right. Just over four months later, a war that seemed inevitable was underway, but the fair rolled along regardless. It was a fair that heralded a great many changes in the wind, from media (NBC began broadcasting television on this day) to technology to architecture to design to food.
You can take a virtual tour of what the year-long fair was like here.
[Also on April 30, the Newfoundland-born politician Don Jamieson was born, in 1921. Here's last year's Daily Dot post.]