On 6 April 2019 the GPS system, used by many organizations for critical infrastructure, will perform a rollover. The rollover is the result of a legacy GPS navigation message which gives a week number as a ten-bit parameter. As a result, the week number parameter in the GPS navigation message needs to reset to zero every 1024 weeks. That means from that date onwards, we are likely to start seeing rollover problems in GPS receivers that aren’t programmed to cope with the week number reset.
Source: Meinberg News EN Meinberg GPS receivers are ready to handle the Week Number Rollover