SharePoint 2010: Change Regional settings in Central administration as well as at the site collection level

Regional settings plays a very vital role as the SharePoint has been 

extensively used all over the world with different languages.

So many requirements can arise such as:

-How can we set the default regional settings for the new site collections?

-How can we change the default regional settings once the site collection created?

-How can we change the default time zone?

-How can we change the default calendar?

-How can we set the alternate calendar?

-How can we change the time format? 12 hour/24 hour?

Primarily we are going to focus as how we can change the regional settings in central administration as well as at the site level.

Change Time Zone settings in Central Administration:

-Open the central administration

-Application management

-Manage web applications

-Select the appropriate web application on which you need to change the default regional settings

-General settings from the top dropdown

-Default time zone

-change it as per your requirement.

Change Regional settings at the site collection level:

-Open the site collection

-site actions

-site settings

-site administration

-Regional settings

-change any settings as per your requirements.

If you have any queries / questions regarding the above mentioned information then please let me know, I would be more than happy to help you as well as resolves your issues, Thank you.