Well Ok then.
People from the north of england often call dinner "tea", so when you're a child living amongst northern goblin children you will often hear things like "I'm going home for my tea" or something, northerners as I have found, due to having an annoying number of them in my family (lol pretending the north south divide is a big deal, lol hyperbole), northerners have "tea" earlier than southerners have dinner, a northerner will often go home for tea at 5 pm, while I would consider this ridiculous and eat dinner at around 6 pm.
Northerners are the main people who say tea to mean dinner, but many Irish people do, and I've even heard welsh or scottish people say it.
To a southerner like myself, this is ridiculous.
Tea, can also mean a light supper taken at 5 pm, but well I only find posh people do that, and they suck.
To me, a "tea time" is quite a broad term, but the most likely one is something akin to a cream tea, which is a pot of tea brewed and then served with scones, these scones are then topped with clotted cream (http://en.wikipedia.org/wiki/Clotted_cream
) and jam, and it's amazing and terrible for you.
Otherwise, I mean, I drink around 5 cups of tea a day (back in england anyway, but you can only buy 50 tea bag boxes in italy, so that'd be ridiculous), and I don't drink much tea compared to a lot of people, so, tea time is all the time if you simply mean tea time to mean a time when people drink tea.
The best "tea time", is by far, elevenses which is simply where you get a cup of tea and a slice of cake (or a handfull of biscuits) at 11 am.
Because, why the fuck not man?