If you call breakfast the first meal of the day, then that's usually around 11 to 12 'o clock or nothing, but I can happily last to the entire day without food and not have a problem with it.
The only risk is that I'll probably eat some really regretable stuff if I get myself too close to a supermarket between that time...
What's the highest amount of a single sort of food that you've eaten in one single day?