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Most of the world writes dates day first, the US month first, and East Asia, Canada and Sweden year first. Default formats for 44 locales from Unicode CLDR, which countries use month-day-year, and how to write dates nobody misreads.

At most airports, liquids in your cabin bag must be in containers of 100 ml or less in one clear bag. What counts as a liquid, the US, UK, EU and India rules, airports that allow 2 litres, medicines, duty-free and packing tips.

In 5W-30, the W stands for winter, 5 is the oil’s cold-weather rating and 30 is how thick it stays when the engine is hot. How to read and compare any oil grade, why the right grade affects fuel economy, the API Donut symbol and the current API SQ category.

Algebraic chess notation names every square with a letter and a number and writes each move as the piece letter plus the square it moves to, like Nf3. Piece letters, captures, check, castling, promotion, the FIDE rules and a full game read move by move.

Most people reach for the spinach leaves when making dal palak and quietly throw the…