Google as a company was officially founded and released to the public on September 4, 1998.

If you mean the search engine itself , its development began earlier, in 1996, under the name “Backrub,” and it evolved into what we know as Google shortly after.

So in everyday terms, people generally treat September 4, 1998 as the date “Google was released.”

Information gathered from public forums or data available on the internet and portrayed here.