title: Convert datetime value from one timezone to UTC timezone using sql query
body: <p>I have a datetime value.
  That datetime value may be in any timezone like 'Eastern Standard Time' or 'India Standard Time'.
  I want to convert that datetime value to UTC timezone in SQL.
  Here from timezone value will be the given parameter.
  I can achieve this using C# code also. But I need this in SQL query.</p>
  <p>Can anyone tell me how can I convert that?</p>