In farms in Ireland its typically Breakfast - Dinner - Tea. Where your main meal of the day (dinner) is around 12-1pm and the evening meal (tea) is light. Your occasional cup of tea before bed is supper.
Outside of farming people have their main meal (dinner) when they come home from their office in the evening. So the lighter meal in the afternoon becomes lunch and theres no tea.
Outside of farming people have their main meal (dinner) when they come home from their office in the evening. So the lighter meal in the afternoon becomes lunch and theres no tea.