SymptomsI am unable to set the subscription expiration date later than 2038-01-19.
The minimum representable time is 1901-12-13, and the maximum representable time is 2038-01-19. At 03:14:07 UTC 2038-01-19 this representation overflows.
Therefore, you can still change the subscription expiration date for 01/19, because it is valid till 03:14:07 UTC. This is not a Parallels problem, but rather an issue known world-wide. At this point, it is not a crucial problem, but will be only in 2038, when the solution must be found by our developers and other IT people.
Please refer to the following article from Wiki for more detailed information.