Google's homepage today features a special Google logo incoporating a birthday cake and an oversized number eight designed to celebrate "Google 8th Birthday!"
According to Google's FAQ:
When is Google's birthday?
Google opened its doors in September 1998. The exact date when we celebrate our birthday has moved around over the years, depending on when people feel like having cake.
Google apparently feels like having cake today!
Google's official timeline:
The search for a buyer
Larry and Sergey continued working to perfect their technology through the first half of 1998. Following a path that would become a key tenet of the Google way, they bought a terabyte of disks at bargain prices and built their own computer housings in Larry's dorm room, which became Google's first data center. Meanwhile Sergey set up a business office, and the two began calling on potential partners who might want to license a search technology better than any then available. Despite the dotcom fever of the day, they had little interest in building a company of their own around the technology they had developed.
Among those they called on was friend and Yahoo! founder David Filo. Filo agreed that their technology was solid, but encouraged Larry and Sergey to grow the service themselves by starting a search engine company. "When it's fully developed and scalable," he told them, "let's talk again." Others were less interested in Google, as it was now known. One portal CEO told them, "As long as we're 80 percent as good as our competitors, that's good enough. Our users don't really care about search."