> Well, they would, if they knew which epoch they were in, which isn't transmitted by the satellites Realistically that is only a problem for devices not yet s

> Well, they would, if they knew which epoch they were in, which isn't transmitted by the satellites Realistically that is only a problem for devices not yet supporting the 13 bit week field or if we still use GPS in 150 years and even then heuristics could solve this problem unless devices exist that without software updates will live for longer than ~100 years.