Change the payment date.

Changing the payment date can only be done by adjusting your delivery date, as they are linked; payment is typically taken 4 days before delivery.
 

If you want your payment to be taken sooner, you will need to bring your delivery forward. If you want to delay your payment, you will need to push your delivery back.

Changing delivery dates can be done on the Subscription page of your customer account, or Customer Care can also do this for you.