GPS is indeed happily unaware of leap seconds, it started counting seconds on January 6th, 1980 (UTC) {1 week is 604800s, weeks count 0..1023, there already was

GPS is indeed happily unaware of leap seconds, it started counting seconds on January 6th, 1980 (UTC) {1 week is 604800s, weeks count 0..1023, there already was one rollover}. http://imgur.com/a/uq6D0 http://imgur.com/a/uq6D0 A few minutes ago, when the screenshot was taken, this was second #501074 in week #1928. As a courtesy to users, GPS transmits the current number of leap-seconds inserted in UTC (currently: 17) and the fact that a leap-second will be inserted the next occasion (end of this year: "LEAP PENDING!"). That's of course very helpful when you are using GPS disciplined clocks for timekeeping.