Noting this recent advice from TomTom..
"What is the GPS Week Number Rollover? (ex https://www.tomtom.com/en_gb/updates/ on 03APR19)
The GPS Week Number Rollover (WNRO) occurs every 19 years, with the next roll over taking place on 6 April 2019. Similar to odometers in older cars rolling over from 99,999 km to 0, the GPS WNRO is the resetting of the GPS calendar back to 0.
When the calendar ...