If you have credits in your offering online for yogis, they can purchase these by booking a class or by the offering at My Schedule.
If a yogi wants to book a class in future and does not have a valid credit the yogi will be promoted to purchase one. After purchasing, the yogi is booked onto the class with a valid credit. The validity of the credits starts on this date. Note that if a yogi decides to book a class before this date, it is not possible to do so with this credit. As a teacher you can manually adjust the start date of the credit, if you have agreed to do so at the yogi's page.
If a credit is purchased by the offering at My Schedule, the card will be valid from the day of purchase. If a yogi decides to buy the card while another credit is still valid, these two cards will have an overlap in validity. You can change the start date of the credit if you wish to do so at the yogi's page.