Welcome to the newest future Facebook user.

Priscilla Chan and Mark Zuckerberg announced via a Facebook post the birth of their second child, August. The parents shared a photo of August with her sister Max. Zuckerberg also posted a letter, which is focused on childhood.

SEE ALSO:Mark Zuckerberg is taking two months off to spend time with his second daughter

"The world can be a serious place. That's why it's important to make time to go outside and play," Zuckerberg wrote.

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When Max was born in 2015, Zuckerberg shared a letter and announced the creation of the Chan-Zuckerberg Initiative.

Zuckerberg revealed earlier this month he would be taking two months paternity leave this year. Facebook allows employees to take four months off. Zuckerberg will be taking a month off now and another month off later this year.

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