in the cold light of day

If you think about something in the cold light of day, you think about it clearly and calmly, without the emotions you had at the time it happened, and you often feel sorry or ashamed about it.

如果你in the cold light of day地思考了某事，就是表示你很冷静仔细地思考了某事，不带任何情绪的，尤其指事发时你是带有情绪的，之后平静下来之后in the cold light of day感受到了当时自己的情绪是不对的

事后冷静理智地回想某事(常感到遗憾或羞愧)

The next morning, in the cold light of day, Sarah realized what a complete idiot she had been.

第二天早上，莎拉回过头来冷静地想了想，意识到自己当时是多么的愚蠢。