How to maintain a common datetime format as per locale of user using the web application

Question

I've the datetime stored in UTC format in my database. I want to have a common API that should convert the datetimes format(mm/dd/yyyy or dd/mm/yyyy) according to the browser culture/locale of the user using the application.

Currently I'm using

 string temp = DateTime.Today.ToString("MM/dd/yy", ,DateTimeFormatInfo.InvariantInfo);

Also, in javascript how can I take care for the same. Any help is appreciated.

Thanks