To find the expiration and renewal date of the Pandora music app you have to visit the official site of the Pandora. Here in the setting menu check your account.
You should know the expiry. The date you will get immediately you subscribe to the package. To renew the membership, you should update 45 days before the expiry.
On account settings you can easily find detail of expiry as well as renewal of subscription. Keep yourself updated by checking your account to subscribe again before your package get expired.
