When I first arrived in London, in 2009, the BT tower was counting days to the Olympics. The countdown was slowly moving down from the 900s. Now, the moment is only a day away! The Olympic Games 2012 open tomorrow.Olympics

Over the past few months London has had mixed feelings about the games. Some Londoners deeply resent them and have long ago made plans to escape the city, others grumble about the traffic the games will bring but are secretly excited, and the rest have been counting days with the BT tower and are warmly welcoming the event.

To get an idea of the enormity of the games, watch the BBC animation on Olympics people in numbers, or the more general Guardian animation on Olympics in numbers. You’ll learn that this is the third time London is hosting the Olympics, and 203 countries are participating this year. The global audience to watch the opening ceremony tomorrow evening is estimated to be around 4 billion people. That’s 60% of the world’s population.