LOL, days are different for him. 
I don`t eat by days, I eat by time, which happen to fall on certain days.
For instance, my calories for the next "day" reset at 8 am. What this means is that from 8 am until 8 am the next day is my time frame to ingest my calories.
For instance, if I am eating 2800 calories:
10 am: I eat 600 calories
3 pm: I eat 1000 calories
9 pm: I eat 400 calories
2 am: (the next day as it reads but obviously not 24 hours of time passage) I eat 800 calories
I have reached my 2800 caloric limit
I cannot eat anymore until at least 8 am
........................ ........................ ........................ ....
Do you see how this works yet? This is a way to ensure 2800 calories in a 24 hour period with no deviation. A lot of people overeat and do not realize because they think like YOU do, in "days" rather than actual time elapsed.