Please use https://xkcd.com/1179/ dates in the date display in the SSL certificate display dialog, in these UI elements: General tab, under Period of Validity: Begins On Expires on Details tab, under Validity: Not Before Not After What you have now is the most confusing thing I ever saw.
Status: UNCONFIRMED → NEW
Ever confirmed: true
Summary: please use https://xkcd.com/1179/ dates in SSL cert dialog → use ISO 8601 dates in SSL cert dialog
(In reply to Paul Wise from comment #0) > Please use https://xkcd.com/1179/ dates https://xkcd.com/927/ The problem with ISO8601 dates for this dialog is that they are only unambiguous if you *know* that they are ISO8601 dates, which is not the case in UI (and since ISO8601 is different from every conventional date format that I know of, we can't even rely on people guessing correctly by accident). I think a much better solution is to spell out the month name: see bug 443811. Or display both.
I'd be happy with locale-specific long dates, RFC822 or ISO8601/RFC3339 dates for user-visible dates. Anything else is probably not a good idea.
Duplicate of this bug: 1419227
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