this post was submitted on 14 Sep 2023
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ISO8601

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Community dedicated to the international standard YYYY-MM-DD date format.

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What is the need of T in the new (2019) time format? (lemmy.sdf.org)
submitted 2 years ago by lambalicious@lemmy.sdf.org to c/iso8601@lemmy.sdf.org
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Basically title. 2019 edition of the Standard denotes the "T" prefix to time as mandatory (except in "unambiguous contexts"):

01:29:59 is now actually T01:29:59, with the former form now designated as an alternative

But date does not have a "D" prefix, not even in "ambiguous contexts".

1973-09-11 never needs to be something like eg.: D1973-09-11

Anyone know the reasoning behind this change and what is the intended use? The only time-only format with separators that I can think would be undecidable in ambiguous contexts would be hh:mm which I guess could be mistaken for bible verses?

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[–] qaz@lemmy.world 2 points 5 days ago

Maybe because spaces aren't available in some contexts (like URL's) and you don't need both T and D to make it more easily recognizable.