International Workers' Day - 01May2012

International Workers' Day (also known as May Day) is a celebration of the international labour movement. May 1 is a national holiday in more than 80 countries and celebrated unofficially in many other countries.

國際勞動節又稱「五一國際勞動節」、「勞動節」、「國際示威遊行日」，是世界上大多數國家的勞動節。

wiki : http://en.wikipedia.org/wiki/International_Workers%27_Day

中文 : http://zh.wikipedia.org/wiki/%E5%9B%BD%E9%99%85%E5%8A%B3%E5%8A%A8%E8%8A%82