public static bool CanStartNextProgram(this UserDailyRewardData data, DailyRewardProgramType nextProgram, DateTime now) => default;
 public static void StartProgram(this UserDailyRewardData data, DailyRewardProgramType programType, DateTime now)
 {
 }
 // Extension methods
 public static DailyRewardProgramDay GetCurrentProgramDay(this UserDailyRewardData data) => default;