Two digit years have always been a problem. I always presume that the use two
digit years was obsolete after the Y2K publicity, but bad habits continue.
We are no longer in the era of eighty column punch cards, so there is no
excuse for two digit years.
ISO8601 is the international standard, so it is not ambiguous. In other
formats, using four digit years and month names are not ambiguous no matter
the element order. Any other formats require a time consuming examination
for clues as to element order or an explanation from the source.
My input data may be in any of the formats. Once I determine the order of
the elements and resolved two digit years, I can easily convert to ISO8601.
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