It’s impossible to set an exact date for the birth of the Internet. You could say that it was born when the first two nodes of the ARPANET were connected between UCLA and SRI International in Menlo Park, California, on October 29th, 1969. Or you could say that it all began when Len Kleinrock and his team at UCLA transferred some data between two computers on September 2nd that same year.
However you look at it, the date is now very near, and in its 40 years of existence the Internet has changed our lives forever.
Mashable: The Internet About to Turn 40, Last Seen With a Blonde in a Red Corvette