中秋节的英语是Mid-Autumn Festival
英 [mɪd ˈɔːtəm ˈfestɪvl]  美 [mɪd ˈɔːtəm ˈfestɪvl] 

例句：
After the Mid-Autumn festival, it became increasingly cool. 

过了中秋，天气愈加凉快了。

Mooncakes reunion, is symbolizing the Mid-Autumn festival will feed. 

月饼象征着团圆，是中秋佳节必食之品

The Mid-Autumn Festival is coming. 

中秋节就要到了。

Still remember the happy time on Mid-autumn Festival when we were children? 

还记得儿时我们共度的那个中秋吗？