International Tea Day: one plant, thousands of styles.

International Tea Day is observed on 21 May. True tea — black, green, white, oolong and related styles — begins with Camellia sinensis, while processing, cultivar, place and brewing create the extraordinary range in the cup.

That single fact is one of the most useful organising ideas in the whole Sipping tea section.

Withering, rolling, oxidation, heating, shaping and drying can all influence what tea becomes. Green and black tea are not different plants in the ordinary sense; they are different processing pathways from the same species.

Once that clicks, the tea aisle becomes considerably less mysterious.

The FAO uses International Tea Day to highlight tea’s cultural and economic importance and the millions of people whose livelihoods depend on tea production.

That gives Sipping a reason to connect taste with origin, farming, processing and sustainability rather than treating tea purely as a flavoured consumer product.

Water temperature, leaf dose, time and vessel can change the same tea dramatically. A harsh cup is not always evidence of bad leaf; sometimes the kettle has simply arrived with too much confidence.

Practical brewing guidance is therefore one of the most useful links from an International Tea Day page.

Peppermint, chamomile, rooibos and fruit infusions are valuable drinks in their own right, but they do not come from Camellia sinensis. Keeping that distinction clear makes the whole category easier to understand.

Everyday language can still call them herbal teas. Sipping can be technically correct without becoming the terminology police.