I just think it's weird to use "tea" to refer to the evening meal. Tea implies, at most, a small snack with the eponymous tea. Same with "getti together for coffee" or "a drink" or "drinks."
Here, it's breakfast, lunch, dinner. In between maybe coffee or a snack. Later in the evening, one can have a late desert, drinks, and maybe a post drinks meal that has no name because if one is eating a pile of starch at 2 am, one is too drunk to name it.
However, a lot of people 'round here who speak with an older, more provincial dialect, refer to lunch as dinner and dinner as supper. These people also use words like yinz, nebby, innat, etc.