ZOHO CRM - Date format Question

ZOHO CRM - Date format Question

In the CRM module  there is a field called 'Closing Date' in the Potential file.     I need to create a variable that pulls out the month and year.   Closing date = 11/08/2013   I want a variable = 112013. 

I'm trying to run reports that sub-total on MonthYear regardless of the actual closing date within that month.

I created a variable using this function  Month(${Potentials.Closing Date}) 

This does get me the month but I don't know how to concatenate the year.

Thank you for your help!