when Facebook users across the world logged in to the social network today they were met with a cheesy video wishing them a "Happy Friends Day!"

Facebook's users will, by now, be used to its round-up videos that celebrate minor mile stones such as joining the social network and anniversaries of becoming friends on Facebook. But the company has now taken it one step further and made up a holiday.

"This Saturday, February 4, is Facebook's 13th birthday, a day we call Friends Day," said Oren Hod, Facebook's product manager.
For the past two years Facebook has celebrated the made up holiday on the anniversary of its launch. But this year it has decided to buck that trend, sharing personalised videos with its billions of users today - February 2.

Not only has Facebook decided to change the date of its so-called Friends Day today with no explanation, it also duplicates a real holiday. The official International Friendship Day, recognised by the United Nations, is marked as July 30.

The celebration has left users somewhat confused.