Your subscription renews monthly on the same day each month. If a monthly subscription starts on the 29th, 30th, or 31st, the renewal date will change when the renewal month doesn't have a corresponding date. For example, a monthly subscription started on August 31 will renew on September 30, and it will continue to renew on the 30th of each month until February. In February, it will renew on the 28th, and will continue to renew on the 28th indefinitely.
Subscription renewal can be cancelled any time before renewal date by logging into your customer account.