Minnesota Governor Mark Dayton has declared June 7 to be "Prince Day" in Minnesota to mark what would have been his 58th birthday.
Prince died on April 21 from an accidental overdose of the narcotic painkiller fentanyl.
The governor's proclamation, issued on Monday, is meant to celebrate his contributions to music and the entertainment industry, and his quiet philanthropy.
The proclamation urges Minnesotans to wear purple on Tuesday in honour of Prince's legacy.
Other commemorations planned for Tuesday include a Let's Go Crazy dance party at the Rock and Roll Hall of Fame in Cleveland, which inducted Prince in 2004.
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Spike Lee hosted a huge birthday tribute to Prince in New York on Saturday.
As a practising Jehovah's Witness, Prince himself might not have celebrated the date had he lived.
