Clandestine Shipping
 

I have a parcel in transit with tracking.

Tracking history indicates that the parcel was processed through an “unknown” facility last evening.

The arrival estimate has also been moved back from the 16th to the 17th.

Is there a black market for postal scanning technology?

The legendary "unknown" facility is where items ordered over the "dark web" are processed.
It is rumored to be located near Area 51.

Yes

That, of course, is the subject of some high-level (and a lot of low-level) consideration, but, as long as you remembered to change your clocks, you won't be fined.