The GPS rollover – it sounds like an April Fools joke a few days late, but it’s not. It feels like Y2K, but more confusing. The GPS (Global Positioning System) rollover – which is actually a reset – is going to happen tonight (April 6, 2019) at 7:59pm EST / 4:59pm PST / 11:59 GMT. That is when the GPS system will reset its time-tracking to 00:00.