Posted by Todd Jackson, Gmail Product Manager

Five years ago yesterday, Gmail starting giving people a gig. What started as an internal tool for Google employees is now used by tens of millions of people around the world in 52 languages.

In honor of the occasion, you may have noticed a little cake on the Gmail homepage today.

We wanted to put it there yesterday, but given that Gmail launched on April Fool's day 2004 and has a history of joking around on April 1st since then, we did something else instead.

In all seriousness, we want to give a big thank you to all of you who use Gmail every day, to those who've been around since the beginning, to those who were using an AJAX app before the term AJAX was popular, to those who started chatting right in your email and then video chatting a couple years later, to those who changed your theme on day one, and to those who have turned on some of the 43 experimental Gmail Labs features (and put up with the occasional bugs they introduce)...we couldn't have gotten here without you. Thanks.