EARTH! I grew up with the big meal of the day at noon until I went to high school and it was too far from home. During my grade school years (1st through 8th) we lived only a couple of blocks from the grade school that I went to. I think it was an hour we had for lunch. My dad sold cars and it was easier for him to get away at about the same time in the middle of the day than in the evening because more people wanted to look at cars at the end of their work day. My mother liked cooking and cleaning up in the middle of the day better than in the evening. It is still what I prefer and have been doing most days since I retired.