My experience was about the same as of troy's experience.
Evening meal about 6 p.m. - dinner - a large meal but Sunday dinner about 3 p.m. On occasion supper/dinner were used for the same meal. I learned the difference when on my first trip to Ireland. The B&B I stayed in offered "breakfast and supper" so I skipped dinner and had to make do with tea, toast and jam for *supper!