If you are offering subscriptions in your school, you might have given the chance to your users to first "play around" for some days, by enjoying a Trial subscription period. Follow these steps to extend your user's Trial period,
1. Ιn your Stripe dashboard, navigate to Subscriptions, and click on a specific customer.
2. Click on Update subscription.
3. On the customer's account page, scroll down and click on Edit.
4. At the popped-up calendar, choose the preferable date for their Trial expiration:
Note: This process is also used to change the billing cycle of a subscription.
For example, if you wish to change the subscription renewal date from i.e, the 10th of a month to the 20th, you should first put the user in a Trial period.
After the Trial period ends, the user will be a subscribed user, with the new billing date.
Prorate should be disabled to avoid giving credits to a user, after turning the user's subscription to Trial (When a customer’s plan changes during a billing cycle, a proration line item is applied on their next invoice.
They receive a credit for the unused portion of the old plan and are billed for only the remainder of the month for the new plan).