Earlier, its CEO Mark Zurkerberg had urged Facebook users to celebrate its 12th anniversary as 'Friendship Day'.

"On February 4, I hope you'll join me in celebrating #friendsday – a moment to celebrate the friendships that have made a difference in your life," he had posted.

The acts of friendship, love and kindness we all share on Facebook are changing the world every day in ways we can't fully measure, he added.

"Sometimes they just make people in our lives feel a bit more loved. Sometimes friendship becomes a force that sets us on a different path in life. Sometimes friendship moves the world," the 31-year-old billianoire added.

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