When did humans start associating certain foods with specific times of the day?

[Thudlow_Boink]

@AlsoNamedBort

Did Grog criticize Ogg for eating woolly mammoth in the morning instead of dodo eggs?

Well, it does take a lot longer to roast a woolly mammoth than to fry up some dodo eggs.

The very first SDMB thread I ever started was along the same lines as this one:

Breakfast vs. non-breakfast foods

Well, here I go, taking the plunge and starting my first New Thread, with what I hope is not too stupid a question: Why are certain foods traditionally considered “for breakfast” (like cereal, pancakes, eggs, bacon, sweet rolls, juice, etc.) while others are for lunch/dinner/supper? Why, for instance, does someplace like McDonald’s serve a completely different menu before and after 10:30 a.m. (or whatever the cutoff time is)? What’s the difference between foods we eat in the morning and at othe…