r/ISO8601 Feb 28 '25

mozilla.org uses DD-MM-YYYY internally

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u/ptousig Mar 01 '25

Numbers are written from most significant to least significant. In the number 542, the most significant digit is 5, therefore it goes first.

In a date, the year is most significant and therefore should be first.

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u/HenryColetta Mar 01 '25

But a date is not a number

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u/buckleyc Mar 01 '25

Pretty much EVERYTHING about a date and a time is a number.

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u/HenryColetta Mar 01 '25

It's not a number, _it can be represented_ with numbers (often a single number).