Code:
		myPicker = new Picker.Date($$('a.open, #pk1date'), {
			toggle: $$('.toggle'),
			positionOffset: {x: -10, y: 20}
		});
I am trying to change the date format to DD/MM/YY

Honestly, on this occasion I have tried every possible combination using dateFormat: 'dd/mm/yy' within this code but I simply cannot get it working because of syntax issues.

Can someone please assist me.