暑假的英文是“summer vacation”。它的来源是源自于英语单词"summer"和"vacation"的组合，summer指夏天，vacation指假期。

例句：

I'm looking forward to my summer vacation.

(我期待着我的暑假。)

I plan to travel during my summer vacation.

(我打算在暑假期间旅行。)

I'm going to spend my summer vacation at the beach.

(我打算在海滩度过暑假。)