The Subscriptions web store interface presents several dates users need to know to effectively manage their subscriptions:
Activation Date: The date the subscription is first available for use by the customer.
Expiration Date: The date the subscription is set to expire.
Last Billing Date: The date the customer was last billed for the subscription.
Next Billing Date: The date the customer will receive their next bill for the subscription.
Renewal: The date the subscription was last renewed.
Added: The date the add-on was added to the subscription.