Setting ISO 8601 Date and Time Format on Your Macintosh
Choose the Date & Time control panel. The following will appear:
Date & Time
Click on both Date Formats... and Time Formats..., which will cause the two dialog boxes below to be displayed.
Set the Long Date and Short Date formats as shown in the first illustration. Note that Custom and Year-Month-Day have been selected and all four check boxes are checked.
Note also that, for the long date style, the year-month-day sequence (and its punctuation) is simply a recommendation. ISO 8601 does not deal with long dates (where the month is spelled out).
Click on OK when you have finished setting the Date format.
Set 24-hour time, as shown in the next illustration.
Click on OK when you have finished setting the Time format.
Close this window when you've finished with it. The SI Navigator window will still be open.
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