NEW YORK (CBSNewYork/AP) — For the first time ever, one billion people used Facebook in one day this past Monday.

Facebook chief executive officer Mark Zuckerberg marked the occasion with a post on his own Facebook page, saying that one out of seven people on Earth logged in to the social network to connect with their friends and family.

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“When we talk about our financials, we use average numbers, but this is different,” Zuckerberg wrote. “This was the first time we reached this milestone, and it’s just the beginning of connecting the whole world.”

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The 1 billion figure is different from the daily user numbers Facebook discloses each quarter when it reports its financial results. Those are the average number of daily users, counted over a 30-day period. Facebook had 968 million daily active users in June.

Overall, Facebook has nearly 1.5 billion users who log in at least once a month. It hit the 1 billion user milestone in October 2012. Most people on Facebook live outside the U.S. and Canada.

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