This reminds me of how NASA would never have a Shuttle in flight during the transition from December 31 to January 1, because they were unsure as to whether the shuttle's computers could handle the rollover correctly [1]. Sure, they could have updated the software to make sure that the rollover was handled correctly, but that would have required them to recertify the entire OS running the Shuttle, and it was easier to just plan missions such that the Shuttle was never flying on New Year's Eve.
[1]: https://usatoday30.usatoday.com/tech/science/space/2006-11-0...