学校开放日英语是School open day或open house。
例句：
1、下个月我们将迎来学校开放日。
Next month we will have our school open day.
2、我和母亲及儿子一起参观了学校的开放日。
I visited the school open day with my mother and son.
3、一周后，萨拉和我参加了特德学校的开放日活动。
A week later, Sara and I attended open house at Ted's school.
4、我和母亲及儿子一起参观了学校的开放日。
I visited the school open day with my mother and son.
5、今天不是学校开放日吗？
Isn't it school open house today?
樱桃啃丸子：）
