The other side of the moon

Here's a simple snippet of PHP code:

        setlocale(LC_TIME, 'de_CH.UTF-8');
        echo strftime("%x");

I run this on RHEL5 and Ubuntu 8.04 and I get different results:

RHEL5:

       2008-10-07

Ubuntu 8.04:

       07.10.2008

So I look through /usr/share/i18n/locales/de_CH for a hint, and I find it.

On RHEL, d_fmt in LC_TIME maps to <u0025><u0059><u002d><u0025><u006d><u002d><u0025><u0064>, which in English, is %Y-%m-%d, while on Ubuntu, it maps to <u0025><u0064><u002e><u0025><u006d><u002e><u0025><u0059>, which in English is, %d.%m.%Y, which is exactly where this discrepancy arises from.

Now I have no idea how to verify which is more recent, because Ubuntu and RHEL do not package things in the same way. Any ideas?