Each Hyatt Vacation Club resort week that you add to THIRDHOME for other members to book earns you a specific number of travel credits called “Keys.” Some weeks are worth more Keys than other weeks, depending on the location of the resort, size of the residence, and the seasonality. Keys expire 24 months from the start of the stay from which they are earned. For example, if a deposit is made on November 30, 2023, for an October 25, 2024 reservation, the Keys earned expire 24 months from October 25, 2024.