title: Should the POSIX 'CLOCK_REALTIME' clock be referenced to the UTC epoch?
body: <p>I'm using the POSIX clock_gettime(CLOCK_REALTIME, &amp;curr_time) to get the current time of the CLOCK_REALTIME clock. I understand the difference between CLOCK_REALTIME and CLOCK_MONOTONIC. However, what I don't know is the epoch associated with CLOCK_REALTIME.</p>
  
  <p>My first guess was that it would be the elapsed seconds/nanoseconds since the UTC epoch. However, the value that I'm getting is ~180000 seconds which is ~50 hours. Obviously not the time elapsed since the UTC epoch.</p>
  
  <p>So my question: what is CLOCK_REALTIME referenced against? Reboot? Platform specfic? UTC and I'm just doing something wrong?</p>
  
  <p>Thanks,</p>