Changing subscription invoice dates?

Howdy all,

I've looked around a bit for an answer, but I haven't found much of anything promising.

Every month, on the 11th, I receive email invoices for my dozen or so subscriptions. This is a tad too late in the month for us to include those expenses in our invoices for our clients. While we can certainly include those the next month around, I'm wondering if there's a way to back them up just a few days?

In looking at the subscriptions, they all have different end dates. Most are near the end of the month -- 26th, 28th, 30th, etc. But one is on the 11th. Which is when we get the email invoices for /all/ of the subscriptions. If there are different end dates, I'd kinda expect different email invoices at different times during the month.

It's a bit strange. If there's some way to change these subscription periods to end on the 30th without cancelling and creating a new subscription, that would be awesome.

Thanks in advance!