Explain simply why September 24 , 2018 is the correct answer to: Passage: Dancing with the Stars is an American dance competition television series that premiered on June 1, 2005, on ABC. It is the US version of the UK series Strictly Come Dancing. The show is hosted by Tom Bergeron, alongside Erin Andrews, who became co-host in season eighteen. Lisa Canning was co-host in the first season, Samantha Harris co-hosted seasons two through nine and Brooke Burke-Charvet in seasons ten through seventeen. On July 24, 2018, it was announced that season 27 would premiere on September 24, 2018 and its spinoff Dancing with the Stars: Juniors would premiere on October 7, 2018.

Question: Based on this passage, when did dancing with the stars start this season?. Explanation:
To answer the above question, the relevant sentence is: On July 24, 2018, it was announced that season 27 would premiere on September 24, 2018 and its spinoff Dancing with the Stars: Juniors would premiere on October 7, 2018.