For example, perhaps your friend's wedding is coming up soon, and you really would like to attend.

例如，也许你朋友的婚礼马上要举办了，你特别想参加。

When 课堂 - SpeakingMax英语口语达人

In order to attend, you must know the date and the time. You can ask your friend, "When is your wedding?"

为了能够出席，你必须知道具体的日期和时间，你可以问你的朋友，“When is your wedding？”

When 课堂 - SpeakingMax英语口语达人