https://www.cnbc.com/2017/12/04/facebook-ceo-mark-zuckerberg-is-taking-off-december-as-paternity-leave.html >On Saturday, billionaire tech entrepreneur and Facebook CEO Mark Zuckerberg signed off for the month of December. >"I'm going on parental leave for December to be with August and Max, so you'll hear from me a little less. We have a couple more Facebook and philanthropy announcements this year and then I'll see you all in 2018!" Zuckerberg writes on his Facebook page.