I've read alot about date troubles / misunderstandings but don't think I've come up with a work around yet.
We prefer to mail invoices only on fridays so all invoice have a friday date.  As SOs are released, we set the actual ship date.  We then in SO-F say N to Inv date same as ship and then put in friday's date for the invoice, then Y to use existing ship date. Then SO-G we say N to ship date as post date, then post on friday's date.
 
Now this looks good except that our inventory transactions are all on friday's which is a reporting issue.
 
So we started saying Y on SO-G and using ship date as post date.  But that creates a terms issue because the posted invoice date is different than the printed and mailed invoice date.
 
Am I asking for to much or just not understanding what I'm asking for?
Can anyone think of a workaround to get inv trans on the actual ship date and invoices on friday's?