How to change Date format according to the country

Question

I have a requirement to change the order of DD/MM/YYYY tags according to a users country .

http://en.wikipedia.org/wiki/Date_format_by_country

The way that I was

Answer 1

For PHP, this should be a good start: http://php.net/manual/en/function.setlocale.php

For JavaScript: Display date/time in user's locale format and time offset

All in all, most modern languages have locale support built-in very well. You should not have to implement this yourself. It will be tiresome and buggy (localization is hard).