Leap seconds are not accounted for in epoch-time. Basically, 23:59:59 and 23:59:60 have the same value (this also makes it easier by not having to handle the 60

Leap seconds are not accounted for in epoch-time. Basically, 23:59:59 and 23:59:60 have the same value (this also makes it easier by not having to handle the 60 :) ) We disabled leap-seconds at work in our NTP servers, and just use the normal mechanisms to compensate slowly.