Today, Google is celebrating Earth Day with a wonderful Logo on their homepage.

Google is known for changing its homepage’s logo matching international holidays or events.
So far this year, I’ve personally seen the following logos:
- Happy New Year & 25 Years of TCP/IP – January 1, 2008
- 50th anniversary of the LEGO brick – January 28, 2008
- Happy Valentine’s Day – February 14, 2008
- Earth Day – April 22, 2008
Check the official page for other international Google Logos that appeared so far in 2008.
However, this page does not cover the localized Google logo changes. For example, on 17th April, Google.be showed a logo with an Atomium to celebrate the 50th anniversary of Expo ‘58. (I found it on Googlified and on Zorloob). There is a special logo page for Google.be, check here, but it is not updated since 2005. Sad.
Also, I wrote previously about Google changing for 1 hour some of their homepages with black background color in relation to Earth Hour initiative on 29th March . This is not as such a Logo change but it is worth to mention anyway.
My view on these logo changes is: Google plays very cleverly with those one-shot/one-day homepage logo customization and certainly maintain a dynamic image around their logo by doing so.
Many of us go everyday on the Google homepage or its iGoogle version. It is always pleasant to see a special theme on a specific day/event.
Enjoy the Google’s Earth Day Logo while it still shows up.

