I use Books for rent invoices for coworking spaces. Our current system allows to send invoices in advance for recurring invoices. I'm switching invoicing over in Books, and I'd like to be able to do the same. 

Example : 

Invoices for August rent are dated 2020-08-01, but are sent 15 days in advance, on 2020/07/15. 

To be clear, it is not the same thing as sending an invoice 15 days before the due date and giving 15 days to pay it. The invoice has to be recorded on the 1st day of the month.