Here's a example as to why I think the GPS antenna for the time zone is the issue. Fortunately for these Primex systems I have the ability to manually change the time zone to keep the systems clocks in check until I get the new part. Antennas from Garmin have a life span of about 5-7yrs. I understand this is a entirely different system but these antennas are getting their signal from a general source.
The antenna was replaced and immediately the system recalibrates to the proper date and time.