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@Tom The ISO 8601 was only published in 1988 but it existed long before. And yes, I'm aware many other countries use it. I didn't know the ISO number so I just called it the "Japanese" system (afaik Japan was one of the first countries to fully adopt it) as I would call MM/DD/YYYY the "American" system ... you figured what I was talking about.
@user42857 actually the Japanese version is the most logical, considering that time is written in opposite order starting with the highest number and ending with the smallest. They have adapted this to the date as well, so its yyyy.mm.dd hh:mm:ss (not sure about the delimiter symbol).
If there is a whose for who, why is there no whiches (whichse would just sound and look too weird, even for English) for which? It's rather confusing to a non-native English speaker to suddenly being confronted with a whose, which is based on who, suddenly counting for both animate and inanimate objects while who itself doesn't. Then again, English is confusing anyway ...