- google smears the leap second before and after each leap
https://googleblog.blogspot.com/2011/09/time-technology-and-leaping-seconds.html https://docs.ntpsec.org/latest/leapsmear.html https://packetpushers.net/ntp-leap-smearing-what-is-it/ https://developers.redhat.com/blog/2015/06/01/five-different-ways-handle-leap-seconds-ntp/ https://xkcd.com/2266/ Burnicki, “Leap Second Smearing with NTP.”
- do emergency alert systems (EAS) use internet timing?
- what systems failover to internet timing?
- what services actually rely directly on gps?