In English, the prepositions of time are ‘AT‘, ‘IN‘ and ‘ON‘
When do we use ‘AT‘?
Soler, used to, would and usually
Breakfast, Lunch, Snack and Dinner
It is correct, but not very common, to use breakfast (desayunar), lunch (almorzar), snack (merendar) and dine (cenar) as verbs.