五一假期快乐的英文是：Happy May Day holiday！
扩展资料：
五一国际劳动节是一个公共假日，通常在5月1日庆祝。它是一个古老的北半球春节，在许多文化中都是传统的春节。跳舞、唱歌和蛋糕通常是庆祝活动的一部分。19世纪末，第二国际的社会主义者和共产党人为了纪念芝加哥的“干草市场暴乱”，把五一定为国际劳动节的日子。所以，五一节也被称为国际劳动节。
May Day is a public holiday usually celebrated on 1 May. It is an ancient Northern Hemisphere spring festival and a traditional spring holiday in many cultures. Dances, singing, and cake are usually part of the festivities. In the late 19th century, May Day was chosen as the date for International Workers' Day by the Socialists and Communists of the Second International to commemorate the Haymarket affair in Chicago. Therefore, International Workers' Day can also be referred to as "May Day".
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