Does everybody know what time it is? For my American friends it is not Home Improvement’s ‘tool time’, but it’s our favorite TWTW time! This week’s TWTW has a particular theme and I am sure has been a popular talking piece – it’s Mark Zuckerberg and everyone’s guilty pleasure Facebook. Facebook CEO rings opening bell on IPO day On Friday May 18thMark Zuckerberg became a billionaire from the Facebook IPO. In the early hours of the IPO day, Mark rang the opening Nasdaq bell from Facebook’s HQ in Menlo Park, California.