Urge Jar Question – 24 hour planning

Hello! I may have missed this information somewhere, sorry if yes. When we say that I plan my meal 24 hours ahead does it mean I do it in the morning of each day or I plan it during the day as the meals go – breakfast plan during breakfast, lunch plan during lunch etc.? Because I do it in the evening and then it is not really 24 hours from breakfast. What is the recommendation? Thank you!