In the land downunder
Generally:
Breakfast
Morning tea (10am-ish coffee/tea/drink + snack e.g. biscuit, piece of fruit)
(Called morning playtime/break in schools)
Lunch - packed lunch for students/workers; light meal or main meal for those at home(e.g. elderly, shift workers)
Afternoon Tea (3pm-ish coffee/tea/drink + snack e.g. biscuit, piece of fruit)
(Called afternoon playtime/break in schools)
Dinner/Tea - evening meal (6pm-7pm-ish depending on what time people get home from work - main meal for students/workers; light meal for those who have their main meal at lunch time)
Supper - late evening drink + snack (however it is a British thing and this term is not used much anymore.)
BTW, students bring their own lunch to school, usually a packed lunch (sandwiches&fruit) in a lunchbox. Our cafeterias are staffed by volunteers and offer a range of light lunches for purchase. The concepts of cafeterias we see in American movies are totally foreign to us.
I agree with PhillipR: breakfast - lunch - dinner is a good way to universally describe it
Cheers
Jayho
P.S. we don�t have dinner or lunch ladies
P.P.S. I drink tea all day - I have a huge thermal mug on my desk in the office that has my tea ready and waiting for me at my next break.