If you want to find current datetime in SQL Server I suggest to read the following post :
This post is related to new feature available in SQL Server 2008. In SQL Server 2008 there is a function which provides current offset of the system from GMT time as well. Basically it shows the system datetime with offset. I think this can be useful in some of the instances where SQL Server are depending on the time offset.
SELECT SYSDATETIMEOFFSET() AS 'Windows System Time'
Reference : Pinal Dave (http://blog.SQLAuthority.com)