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Articles about how calendars, dates and holidays actually work.
How Time Zones Work — and Why Tomorrow Starts at a Different Moment for Everyone
Tomorrow doesn't arrive at the same instant everywhere. Here's how the world's timezone system actually works, and why a global "tomorrow" needs a reference point.
How Public Holidays Are Decided: A Look at Four Different Systems
Public holidays aren't set the same way everywhere. Here's how India, the United States, the United Kingdom and the UAE each decide — and confirm — their official holidays.
Why Do Some Countries Start the Week on Sunday and Others on Monday?
The seven-day week is universal, but where it starts isn't. Here's why the US and India show Sunday first while the UK, Canada and most of the world start on Monday.