not OP but this sentence disembodied looks more silly than anything. "why get what you want sooner if you can work for months longer?"
Mild caloric restriction is good (too much isn't, nobody should eat 500 cals a day) in terms of health. Some fasting is fine.
Eating through the entire day for example conditions ghrelin to be released and blood sugar to spike through the day which in turn makes people want to eat all the time, etc. Eating "light" through the day basically conditions someone to feel hungry through the entire day. I advise people to look up the subject.
I think OP's problem is more that she wants to do a massive fast for some reason.