Summer vacation/holiday—an extended break from school or work during the summer, often used for travel or visiting family.
子どもたちは夏休み中にプールに行くのが楽しみだ。
Children look forward to going to the pool during summer vacation.
夏休みを利用して海外へ旅行に行った。
I used the summer holiday to travel abroad.
大学の夏休みは短期のインターンシップに参加するいい機会だ。
University summer break is a good opportunity to take part in short internships.