Is it possible to activate an app store Promotional Offer after the end of the user's subscription?

Hi, I have implemented an promotional offer of 3 free months which is promoted when a user tries to cancel their subscription. Currently the offer, when selected is applied for 3 months from date of purchase. However, I want it apply 3 free months after their current subscription period. Is this possible?

Is it possible to activate an app store Promotional Offer after the end of the user's subscription?
 
 
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