Online Invoice: Ability to select the unpaid invoice statement which day of month to send out

We are the same!  Would love the ability to set this for a later date in the month when we can be certain that all our end of month processing has been completed, or alternatively after payments are due (which is even later in the month).

Setting it to be fixed on the 3rd will not work for us because some months we are still raising  invoices on the 3rd (particularly if 1st and 2nd are on a weekend).

I can see that this would save us some time, but with a fixed date it's completely impractical for our business.