I thought everybody knew "the most important meal of the day" was a genius ad slogan for a breakfast cereal company. https://www.businessinsider.com/how-breakfast-became-known-as-the-most-important-meal-of-the-day-2016-6#:~:text=During%20the%20campaign%2C%20which%20marketers%20named%20%E2%80%9CEat%20a,is%20the%20most%20important%20meal%20of%20the%20day.%E2%80%9D