מתי

When can she come?

When do you want to go, before that or after that?

When do you want to come, early or late?

I already know when the bus will come.

When will we meet, in the morning or at night?

They are a new couple, but they are already talking about when to get married.

Even when there is a clear limit, it is not always easy to notice when we have crossed it.

He said that he wants to resign, but he has not decided yet when.