Task: Question Answering
Input (English): Passage: After serving as a guest judge on American Idol, Perry released "California Gurls" featuring Snoop Dogg on May 7, 2010. The song was the lead single from her third studio album, Teenage Dream, and reached number one on the Billboard Hot 100 in June. She also served as a guest judge on The X Factor UK later that month before releasing the album's second single, "Teenage Dream", in July. "Teenage Dream" reached number one on the Billboard Hot 100 in September. Released on August 24, 2010, Teenage Dream debuted at number one on the Billboard 200, and received mixed reviews from music critics. It has since sold 6 million copies worldwide. Teenage Dream would go on to win the 2011 Juno Award for International Album of the Year. In October, "Firework" was released as the album's third single. It became the album's third consecutive number one on the Billboard Hot 100 on December 8, 2010."E.T." featuring Kanye West was released as the fourth single from Teenage Dream on February 16, 2011. It topped the Billboard Hot 100 for five non-consecutive weeks, making Teenage Dream the ninth album in history to produce four number one singles on the chart. "Last Friday Night (T.G.I.F.)" followed as the fifth single in June, and Perry became the first female artist to achieve five number-one Billboard Hot 100 songs from one album when the single topped that chart on August 17, and the second artist after Michael Jackson with his album Bad. For this record, she received an honorary American Music Award in November 2011 and a 2013 Guinness World Record. On September 7, she set a new record by becoming the first artist to spend 69 consecutive weeks in the top ten of the Hot 100. In October, "The One That Got Away" was released as the album's sixth single. The song peaked at number three in the US and number two in Canada. On January 5, 2012, Perry was named the sixth best-selling digital artist in the United States, with sales of 37.6 million units according to Nielsen SoundScan. That month, she became the first artist to have four songs sell over 5 million digital units. On February 13, Capitol released the lead single from Teenage Dream: The Complete Confection, "Part of Me", which debuted at number one on the Billboard Hot 100 and became Perry's seventh single overall to top the chart. Teenage Dream: The Complete Confection was released on March 23. "Wide Awake" was released on May 22 as the re-release's second single, peaking at number two on the Billboard Hot 100 and number one in Canada and New Zealand. 
Question: What date did Last Friday Night (T.G.I.F.) reach number one?
Output (English): August 17.