The first round of the Major in Wisconsin falls on June 15, the same day that Amanda Mickelson is due to graduate from Pacific Ridge School in California.
"As I look back on life, this is a moment I'll always cherish and be glad I was present," Mickelson told the New York Times. "There's no greater joy as a parent."
Amanda was born a day after Mickelson lost his final-round duel with Payne Stewart at the US Open in 1999.
The US Open remains the only Major that has eluded Mickelson in his pursuit of a career Slam.