How to set up 4-4-5 Accounting periods in Business Central

Hi All,

i am trying to set up 4-4-5 accounting period in Business Central but I cannot get this to work.

My client has 12 periods and we have tried to set the period length of 30D, 28D and 1M and then tried to amend the start dates manually, and for some of the periods it does let us amend the start dates, and then it refuses for some others.

Can someone please assist and let me know where I am going wrong.

Thanks

S