Create Next monthly invoice early?

I have a monthly invoice that goes out to a customer each month on the 17th, is due on the 1st of the next month.

This month the client will be on vacation and wants her invoice early, when I click genereate due invoices, its not due yet of course to it doesn't create.

Is there a way to generate an invoice earlier than the date its supposed to automatically generate without having to type out a new blank invoice?