3 sentences

1. 为什么5月1日是劳动节？

   wèi​shén​me5 yuè1 rì shì láo​dòng​jié?

   Why is May 1 Labor Day?

   Source: CCMatrix

2. 劳动节的起源是什么呢？

   láo​dòng​jié de qǐ​yuán shì shén​me ne?

   What is the origin of Labor Day?

   Source: CCMatrix

3. 五月一号是劳动节。

   wǔ​yuè yī​hào shì láo​dòng​jié.

   May 1 is Labor Day.

   Source: CCMatrix