British Labor Day and International Labor Day are closely related.

英国劳动节和国际劳动节息息相关。

When is international labor day?

国际劳动节是什么时候？

May Day is the International Labor Day.

五一节是国际劳动节。

In the solar calendar, May the first is International Labor Day.

阳历五月一日是国际劳动节。

The "May 1st" International Labor day is a holiday for all working people around the world.

“五一”国际劳动节，是全世界劳动人民共同的节日。