Germans, being too efficient for that kind of nonsense, instead say "early piece" for breakfast, "midday food" for lunch, and "evening food" for dinner/supper. 😁

To me it's more a class thing - dinner is the biggest meai, which for workers and students was provided by the canteen in the middle of the day, while intellectuals preferred to discuss over dinner at home in the evening. When I was younger, posh people had lunch(eon), while others had dinner, and at least in the north of england the after-work meal at around 6pm was called 'tea' - which for posher people meant cakes at 4pm. Another variant for the evening is supper - also from french souper. By the way, in french it's dejeuner that literally translates as break the fast (the small variant petit-d being modern breakfast).

In the UK dinner is still typically the lunch meal, and evening meal is called tea.

Dinner is the largest meal of the day. Supper is the evening meal regardless.

In blue collar Appalachia, it often still means the midday meal while "supper" is the evening.

In Romand dialect of French, spoken in Switzerland, Dinner means lunch, and souper means dinner.

Latin is "disiūnō"? Interesting - in Spanish, "desayuno" is the first meal if the day *-*

Morning, midday or evening the time of day doesn't matter it is where that person is on their own schedule. If they are working nights then breakfast is an evening meal and dinner could be 5am.