If switch the calendar on your phone to the Japanese calendar, it may cause a date format error.

[LuckyRoc]

If you switch the calendar on your phone to the Japanese calendar, it may cause a date format error. In the code snippet domainFinalConfiguration[kTSKExpirationDate] = expirationDate;, the expiration date might appear as the year 4041, leading to the expiration time not taking effect.