The post doesn't once mention Facebook, social media or the internet at all. It talks about "worrying about the future" – but doesn't make any specific reference and tells his daughter to ignore those concerns because "you only get to be a child once".
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The Facebook founder and CEO stressed that he hopes his daughter goes outside, rather than doing things inside. And rather than referring to online media, he wrote only about Dr Seuss books.
"You will be busy when you're older, so I hope you take time to smell all the flowers and put all the leaves you want in your bucket now," the post reads. "I hope you read your favourite Dr Seuss books so many times you start inventing your own stories about the Vipper of Vipp. I hope you ride the carousel with Max until you've tamed every colour horse. I hope you run as many laps around our living room and yard as you want. And then I hope you take a lot of naps. I hope you're a great sleeper. And I hope even in your dreams you can feel how much we love you.
"Childhood is magical. You only get to be a child once, so don't spend it worrying too much about the future. You've got us for that, and we'll do everything we possibly can to make sure the world is a better place for you and all children in your generation."
Mr Zuckerberg had written a similar letter to his daughter Max, when she was born in 2015. That letter focused on "the world we hoped she and now you will grow up in – a world with better education, fewer diseases, stronger communities, and greater equality".
But he wrote that this time he and Ms Chan "want to talk about childhood". "The world can be a serious place," he posted. "That's why it's important to make time to go outside and play."
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