Mark Zuckerberg's second daughter is here and named August

Facebook CEO Mark Zuckerberg and his wife, Priscilla Chan, on Monday announced the birth of their second daughter.

The couple revealed the girl's name - August - but didn't disclose any other details about her, such as what day she was born or her birth weight.

Zuckerberg and Chan's first daughter, Max, was born in 2015. The couple unveiled their philanthropic fund, The Chan Zuckerberg Initiative, on the same day they announced Max's birth. The fund, which is backed by Zuckerberg's Facebook fortune, hopes to to cure the world's diseases by the end of this century.

Here's the letter Zuckerberg and Chan wrote to August, which Zuckerberg shared Monday on his Facebook page:

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