The American series premiered on April 26, 2011 on the NBC television network. The winner of the first season was Javier Colon, mentored by coach Adam Levine. The season finale aired on June 29, 2011. It immediately proved to be a hit for NBC and the network renewed the show for a second season.

Answer this question based on the passage: when did the first season of the voice air? OK. Let's think. My stream of consciousness:
This is the relevant information: The American series premiered on April 26, 2011 on the NBC television network. The answer is April 26 , 2011.