Set Time for Scheduled & automated invoices

It would be a really useful feature if we were able to set a specific time that all reoccurring invoices are sent as this seems to send at random times from what I can only work out is from when the initial parent invoice was sent.

I would ideally like all my monthly reoccurring invoices to be sent at a set time as this I have found that if it is sent in the very early hours of the morning then my clients do not read them & I do not want to send them too many payment reminder emails.