Automated date formatting based on browsers locale / location

I am looking for solution in javascript or PHP which format "date" and "time" based on the visitors location and locale settings.

For example

echo auto_format_date(time());

would output 20-09-2011 for users from states and 20/09/2011 for UK users.

Thanks everyone for answers. I've got now several alternatives in front of 开发者_如何学JAVAme, I'll wait for some up-votes to see which approach you think is preferred

In server side code (PHP, ASP.NET...) you can check Accept-Language HTTP header of request to detect client browser language.

Accept-Language: http://www.w3.org/Protocols/rfc2616/rfc2616-sec14.html#sec14.4

You can read additional info: http://www.w3.org/International/questions/qa-accept-lang-locales

You have to get Country from Ip by PHP Geolacator

and than use zned function: date_default_timezone_set('Europe/Berlin');

and when you create date:

$date = new Zend_Date();

echo $date;

You will get what you want...

I have found the following myself:

http://www.w3schools.com/jsref/jsref_tolocalestring.asp

which might help me format date into user's preferred format once it in the browser. Is this a good solution?

I found another answer, which relies on datejs

https://code.google.com/p/datejs/wiki/FormatSpecifiers

%x     preferred date representation for the current locale 
       without the time        "4/13/2008"
%X     preferred time representation for the current locale
       without the date        "12:53:05"