When the expiry of the reward is set 'in days' (for example, 10 days) then the reward will expire on the 10th day at 11:59 PM because it includes the day when the reward was gifted to the guest.
Example:
Expiry (in Days) is set as 14 days and a reward is gifted to the guest on 11th March then it will expire on 24th March.
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