You can check the exact expiration time for a Set Award directly within the Set, on both screens 2 and 3.

The Award Rewards In section will display when the Award is scheduled to be delivered to qualifying users.

Once the Rewards In time has passed, the Award will expire, and you can no longer earn it by collecting the required cards.

Users who haven't completed the necessary collection by the expiration time will not be eligible to receive the Award.