Ok, I have made the modifications in core.js so now the calendar works with the format yyyy for full year, also when I was making this changes I realise that if you put 2 calendars in the same page it was always taking the format of the first calendar that you clicked on and no it's own format, this was because the calendar is an object that is created only one time and reuse for the other calendars in the page, so I also fixed that. This changes are for oacs-5-2 let me know if you want then in HEAD as well.
