I run a very similar schedule but have added the trendy 'Brunch' and 'Midnight Feast'. Essentially, whenever I need to eat, I can give the meal a title.
Breakfast 6-10
Brunch 10-12
Lunch 12-3
Afternoon tea 3-5
Dinner 5-7
Supper 7-11
Midnight Feast/Munchies 12 - 3