Here's some handwringing from before the first rollover of the GPS epoch: http://www.leapsecond.com/notes/gpswnro.htm http://www.leapsecond.com/notes/gpswnro.ht

Here's some handwringing from before the first rollover of the GPS epoch: http://www.leapsecond.com/notes/gpswnro.htm http://www.leapsecond.com/notes/gpswnro.htm Using the leap second indicator didn't occur to me, but burning in the week of manufacture (or firmware compile date, as ublox apparently does) did.