Monthname in SQL server

Being new to SQL server T-SQL (working with DB2 / ORACLE) is there a function like monthname() in SQL server. I.e. a function that takes date as input and returns the Monthname (like AUG or AUGUST)??This example extracts the month name from the date returned by GETDATE.

SELECT DATENAME(month, getdate()) AS 'Month Name'

Here is the result set:

Month Name
----------
February|||Sorry, where can I put the date where I can extract the monthname from?
I want to add an object that displays 'JAN' or Januari if I have a date like:
01/01/2003|||SELECT DATENAME(month, '01/01/2003') AS 'Month Name'|||Thank you very much..............