Why regular? Maybe he just set his alarm like that the night before he died.

怎么知道是经常？也许他只是碰巧在死前一晚设了闹铃。

I begin the story by saying that I forgot to set my alarm last night.

我开始讲故事时说我昨晚忘了设置闹钟。

I forgot to set my alarm last night and I woke up later than usual.

昨晚我忘记定闹钟了，比平时起得晚了。

But what does this expression mean? Get A Grip Oh, no! I can't believe I did not set my alarm last night!

但是这个短语到底是什么意思呢？Get A Grip哦，不！我真不敢相信我昨天晚上忘记设闹钟了！