You do have the Option to change the billing date, but keep in mind pushing your due date out more than 5 days will put your account in an inactive status. 

If you happen to choose more than 5 days, once you are ready to make that payment there will a be $4.95 re-activation fee IN ADDITION TO your monthly subscription fee.  

This will happen if you choose more than 5 days and your account goes inactive.