How Mark Zuckerberg spends his day?

When asked about the number of hours he spends working, Zuckerberg said that he works 50-60 hours a week, which is 10-12 working hours per day.

Mark Zuckerberg announced at one point that he spends 1 hour per day learning Chinese. However, it's not clear whether he still spends the same time every day doing that.

Mark Zuckerberg said that he reads a book every other week. This could mean that every other week, Mark spends about an hour per day reading a book.

According to a designer who works near Mark Zuckerberg, the latter comes to the office 5 days a week. This doesn't mean that Mark doesn't work on weekends, but just means that he takes two days off from the office.

Mark said that although he spends 50-60 hours in the office each week, he still thinks about the mission, referring to Facebook's mission, 24/7. (See How did Mark Zuckerberg come up with the idea of Facebook?)

Although he doesn't post all the time, Mark said he checks Facebook all day long.

According to sources in Facebook's office, Mark can spend 70-80% of his time reading about successful people online.

According to sources in Facebook's office, Mark travels a lot, but he is also present in the office most of the time. (See Why traveling is good for you?)

Mark Zuckerberg said, as he answered a question online, that he works out 3 days a week and it's usually the first thing he does as soon as he wakes up.

Mark said, as he answered questions online during a Q&A session, that he tries to walk his dog whenever he has time.