What year is on the flag of the US state Wisconsin?

The year 1848 is on the flag of the U.S. state of Wisconsin because it symbolizes an important milestone in the state's history. In this year, Wisconsin achieved its statehood, officially becoming the 30th state of the United States. The number "1848" on the flag serves as a constant reminder of this significant moment and the pride that Wisconsinites hold for their state's origin and heritage. It represents the courage, perseverance, and determination of the people who fought for and established Wisconsin as an integral part of the United States.