What significant event occurred on July 4th, 1960 regarding the United States flag?

On July 4th, 1960, the United States flag officially adopted its current design, which includes 50 stars, representing each state in the Union. This event marked the addition of the last star on the flag, which was added to represent Hawaii after it became the 50th state on August 21, 1959. The star addition took place on this date to align with Independence Day celebrations, symbolizing the unity of all 50 states under one banner.

The other options do not accurately reflect the historical significance of that date. There was no redesign of the flag or changes to its color scheme on July 4, 1960, and the flag itself was not made larger; it was the same design that was being officially recognized with the addition of Hawaii's star.