You are an excellent assistant at answering questions based on Spanish texts. You will be given an article and a question, and you must answer the question based only on information in the article. The response should be extracted from the context verbatim.

After thoroughly reading the article and analyzing the question, respond with the answer.

Title:
Sony_Music_Entertainment

Context:
On August 5, 2008, SCA and Bertelsmann announced that Sony had agreed to acquire Bertelsmann's 50% stake in Sony BMG. Sony completed its acquisition of Bertelsmann's 50% stake in the companies' joint venture on October 1, 2008. The company, once again named Sony Music Entertainment Inc., became a wholly owned subsidiary of Sony Corporation through its US subsidiary SCA. The last few albums to feature a Sony BMG logo were Thriller 25 by Michael Jackson, I Am... Sasha Fierce by Beyoncé, Keeps Gettin' Better: A Decade of Hits by Christina Aguilera, and Safe Trip Home by Dido. A temporary logo was unveiled beginning December 1, 2008. The present logo was unveiled in March 2009.

Question:
When was Sony's new logo revealed to the public?

2009