How to use and where to place globalization tag in web.config file in ASP.Net

Add this line

 <globalization  culture="en-GB" />

in

<system.web>
        <globalization  culture="en-GB" />
</system.web>

Once you added this in the webcofig file it will gets applied to all the pages.

To check this you can write this line in the page load and place a debugger to see the date format

string date = DateTime.Now.ToString();

It will be 27/11/2014 22:14:39. And If you remove the globalization from the webconfig file then it will be 11/27/2014 10:15:33 PM.