Gift cards are popular with marketing executives, but they create accounting questions. Should revenue be recorded at the time the gift card is sold, or when it is used by the customer?

Suppose a customer purchases a $100 gift card at Best Buy on December 24, 2019, and gives it to his wife on December 25, 2019. On January 3, 2020, the customers wife uses the card to purchase CDs. When do you think Best Buy should recognize revenue, and why?