do you have a link to explain the image on the start page. 
some are obvious (like countries b-day, or whatever they celebrate as
their national day), but some are not. for example: today is a fish
jumpin' outta mountain lake. any specific meaning? or just a reminder
to quit our jobs and go fishin'?

thanx for GOOGLE, the best thing since the creation of the woman as
companion of man!

Hello paparuda~

If you click on the special Google image, you'll discover a host of
links that tie in with the theme of the logo. For example, today's
logo leads you to Earth Day links, which is, indeed, what today's
Google logo is all about. :)

Regards,
Kriswrite

Hold your mouse over the google image you speak of and it'll give you
a clue. For example, today's earth day.

The total lists of google's holiday logo is here:

://www.google.com/holidaylogos.html

You may also enjoy browsing the logos shown here (which includes
parodies, knockoffs etc):

Logo Ogle
http://www.logoogle.com/