I would call the time around 9-10am early morning…. I would make around 9-10pm in the morning… What are some lunch options?

The name of some food varies around the world. However, only some people are aware of this. In Australia, we would call the evening meal dinner or tea. Supper refers to a late night snack before bed (what you have called night time snack in your table). In more English-speaking countries, dinner can be considered a mid-day meal while tea itself is considered the evening meal.

What a great question. What are the best way to think about thinking about things in such a rigid way?

What is the best way to explain it to a student the best way to explain it to a student?