It would be very valuable in general to have a Parameter on Sales Setup and Purchase Setup for setting Posting Date = WorkDate and/or Document Date = Workdate. This way the user could choose that Invoices etc. always are posted on the Work Date and/or dated with Work Date.
Parameter for Posting Date could be a choice between
“Document Posting Date” (current standard) or “Work Date”
And
Parameter for Document Date could be a choice between
“Document Document Date” (current standard) or “Work Date”