Every year on September 27, Google posts a special Google Doodle to mark what it calls its “birthday.” In 2025, Google celebrated its 27th birthday by reviving its original 1998 logo as the Doodle on its homepage. The doodle featured the very first wordmark the company used, transporting users back to the late 1990s while reminding them how far the company has come. But this raises some questions: Why September 27? Was Google really founded on that date?

Although Google celebrates September 27 as its birthday, the actual origins are more complicated. The company was incorporated on September 4, 1998. Before incorporation, Google’s project roots go further back at Stanford University. Over the years, Google has used various dates in September for its celebrations. By 2006, the tra

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