I'll send you my rate notices and I'll become your Grand Par lol.
One year over here in the West, our council decided to bring the due date of our rates forward by 1 mth. When you pay, you are paying 12mths in advance, so by rights we should have been credited 1 mth or reduced 1 mth for the first year. No way would they have a bar of that, so they got away with a huge windfall.