Constitution ratified today in 1788

New Hampshire becomes the ninth and last necessary state to ratify the Constitution of the United States, thereby making the document the law of the land. (Source: History.com 06/21/20) 

https://www.history.com/this-day-in-history/u-s-constitution-ratified?cmpid=email-hist-tdih-2020-0621-06212020&om_rid=a031986c654ea9cf68847862c8d8d88de5465e5458d66741416b23e98f9747b9