Date: leap years, week numbers and date formats explained

A date looks like the simplest thing in the world until you need the exact gap between two of them, or discover that 03/04 means April in London and March in New York. Everything here is computed, not looked up.

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All the date tools

The full set runs on the home page, where they share one live clock and stay in step with each other.

Open the date tools → Time zone converter Moon phases How we calculate

Reading on date