Effective dates needed for paying prior year invoices after new fiscal year starts

What effective date(s) should be used when paying prior year invoices once the new fiscal year starts?

Accounts Payable

Year End

New functionality 

Invoice Entry - The effective date on the Invoice Entry batch screen should be defined as the last day of the Current Fiscal Year

Cash Disbursements Journal - The effective date of the cash disbursements journal should be defined as the last day of the Current Fiscal Year