27/09/1998 The Google retrospectively claims this as its birthday
Happy Birthday Google: Search Engine Turns 10
18 Years of the Google Homepage (1998-2016)
The Old Google Site 1998-99
Search Engine Commercials: 1998
The site was originally called BackRub but was changed in 1997 to Google - a misspelling of the word googol which is a term for the number one followed by one hundred zeros. The site is now the world's number one search engine and its name has become so synonymous with searching, it is now used as a verb in its own right.