Full Access credit card subscriptions are billed monthly and can be cancelled any time.
Recurring account billing happens on the same day of the month you signed up. If you sign up on the 28th-31st, then your billing will happen on the day of the month you signed up, or the last day of the month during shorter months.
When you cancel, your account expires a month after your last payment. In some cases, you may get a few extra days when you cancel.