Billing date adjustments follow these rules:
- During a trial:
- If the new subscription includes a trial, the billing date shifts to the end of the new trial.
- If the new subscription has no trial, the billing date resets to the change date.
- Outside the trial period:
- If the new subscription has a trial, the billing date moves to the trial end.
- If there’s no trial and cycles differ (e.g., monthly to yearly), the billing date resets to the change date. Same-cycle subscriptions retain the original billing date.