Trouble having a simple date picker with only Month / Year

Hey!
I'm in need of a date picker, but instead of picking a full date I just want users to choose only month and year.
Both elements 'date' and 'jdate' need fulldate or else the site will be loaded with javascript errors as they cannot validate.

I need to do some calculations via php, my idea was to simply use jdate and calc elements, but that won't do, is there a simple way to accomplish this? I know I can work around my date picker with a calc element and a hidden field element, but that's so obnoxious. Is there another element I can use?

I tried doing my calculations from scratch without using fabrik but Joomla is really weird at handling ajax so I was not able to pass the value from my input to php.

 

Can't you just use two dropdowns, one for month and the other for year?
Or, if it's for only a limited range, even only a single dropdown with month and year?