On June 11, 1982, Holmes defended his title against Gerry Cooney, the undefeated #1 contender and an Irish-American. The lead-up to the fight had many racial overtones. Holmes said that if Cooney wasn't white, he would not be getting the same purse as the champion (both boxers received $10 million for the bout). Although Cooney tried to deflect questions about race, members of his camp wore shirts that said "Not the White Man, but the Right Man." In their fight previews, Sports Illustrated and Time put Cooney on the cover, not Holmes. President Ronald Reagan had a phone installed in Cooney's dressing room so he could call him if he won the fight. Holmes had no such arrangement. Lastly, boxing tradition dictates that the champion is introduced last, but the challenger, Cooney, was introduced last. The bout was held in a 32,000-seat stadium erected in a Caesar's Palace Parking lot, with millions more watching around the world. After an uneventful first round, Holmes dropped Cooney with a right in the second. Cooney came back well in the next two rounds, jarring Holmes with his powerful left hook. Holmes later said that Cooney "hit me so damned hard, I felt it--boom--in my bones." Cooney was tiring by the ninth, a round in which he had two points deducted for low blows. In the tenth, they traded punches relentlessly. At the end of the round, the two nodded to each other in respect. Cooney lost another point because of low blows in the eleventh. By then, Holmes was landing with ease. In the thirteenth, a barrage of punches sent Cooney down. He got up, but his trainer, Victor Valle, stepped into the ring and stopped the fight. After the fight, Holmes and Cooney became close friends.

Answer this question "When did it take place?" by extracting the answer from the text above.
On June 11, 1982,