While it’s doubtful most people know the origins of the Friday the 13th legend — guilty — there’s no denying the fact that when a Friday falls on the 13th, there’s the slightest sense of dread in the air, as …

Some of us measure our popularity in the number of Facebook friends we have. Facebook measures its popularity in the number of “active users” it has—and that number hit 175,000,000 on Friday the 13th, according to a Tweet from Dave Morin of Facebook.