Today is Labor Day, an official US holiday, that happens on the first Monday in September. “It honors the American labor movement and the contributions that workers have made to the strength, prosperity, laws and well-being of the country,” says Wikipedia.
To celebrate, Google, Bing, Dogpile and others have special logos or themes for the day off. Google’s logo above shows industry, distribution, manufacturing, science, design, building, farming and much more. You can see the Google logo above.
Bing goes with construction workers building a building with their black and white theme:

Dogpile repeats their relaxing hammock look:

Here is our theme:

Happy Labor Day!
Forum discussion at Google Webmaster Help.

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