Form field value needs to auto-populate based on current date.

Hello.  I've used Livecycle Designer years ago but have just begun using ES3.  My problem is that I have a form with a field where the value needs to auto-populate based on the current date.  The format is "012016", where "01" represents the first month of the fiscal year (October) and "2016" the fiscal year (Oct 1, 2015 - Sep 30, 2016 = FY 2016).  I can code in VBA but don't know FormCalc or JavaScript at all.  I'm not even sure where the code goes.  Any assistance is greatly appreciated.  Thanks.