Facebook will complete its 10 years of its start on 4th February 2014. Its a Dorm Room project started by Mark Zuckerberg along with few friends as thefacebook.com which have attracted more than 1Billion users throughout the world. TIME Magazine have created a calculator which calculates the amount of Time you have wasted on Facebook from the Day you have joined.
Click here to know check yours- TIME Magazine calculator
You can claculate the time you have spent on Facebook from the day you have started.