Use "When" whenever you want to ask about the timing of a certain event or series of events.

当你想要询问一个或一系列事件的具体时间时，你可以用“When”句型。

When 课堂 - SpeakingMax英语口语达人

For my perspective, even if you understand God to be the creator of the world, I don't think that means that God is causing a certain natural event to happen at certain time.

从我的角度来说，即使你明白,上帝是世界的创造者，但这并不意味着上帝,导致了某个自然界的现象在特定的时间发生。

普林斯顿公开课 - 人性课程节选