International Workers' Day

It's May Day today, but for those who don't know, May Day is NOT a national holiday in United States.

Here is an excerpt from Wiki, better read it through to get a better understand of Labor Day in US.

The United States has its own Labor Day holiday, celebrated on the first Monday in September instead of on May Day. The U.S. version of Labor Day was a creation of the Knights of Labor, and was adopted officially in 1887 in an effort to disassociate labor activism from the radical left. Subsequent efforts to officially switch Labor Day to the international date of May 1 have failed. In 1958, President Dwight D. Eisenhower proclaimed May 1 both as Loyalty Day and as Law Day.

Baidu's May Day logo
Google has no specially-designed logo dedicated to May 1.