Give a stream of consciousness and then the final answer. A second season aired from April 1 to June 17, 2017 on MBS and other television networks. Funimation and Crunchyroll streamed the second season on their respective websites, while Adult Swim aired a dubbed version. The opening theme song is "Opfert eure Herzen!" (心臓 を 捧げよ!, Shinzō o Sasageyo!, lit. "Dedicate Your Hearts!") by Linked Horizon and the ending theme song is "Yūgure no Tori" (夕暮れ の 鳥) by Shinsei Kamattechan.

Based on this passage, attack on titan anime season 2 release date?

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
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To answer this question, we should know that: A second season aired from April 1 to June 17, 2017 on MBS and other television networks.
So, the final answer is April 1 to June 17 , 2017.