the.com/dinner
The day's main meal, masquerading as both lunch and the evening's emotional centerpiece.
means The principal meal of the day, usually eaten in the evening but historically whenever it was biggest.
from From Old French disner, to break a fast, traced back to Latin disjejunare — the same fasting-breaker that secretly gave us breakfast.
Time travelOnce eaten at midday before industrial work shifted it later.
Same rootShares its origin with the word breakfast.
Class markerCalling it dinner versus supper still signals regional roots.