title: Will Linux servers running NTPD be affected by plans to add a leap second in 2015?
body: <p>I <a href="http://www.telegraph.co.uk/news/science/science-news/11327571/Leap-second-French-time-lords-add-one-second-to-2015.html" rel="nofollow">have read</a> that there are plans to add a leap second in June 2015. At work we are running a number of Linux (Ubuntu) servers with <code>ntpd</code> installed to keep the time in sync and correct across them.</p>
  
  <p>Does anybody know how this time change will affect us, i.e. whether or not we need to do anything other than just let <code>ntpd</code> correct the time for us?</p>
  
  <p>I can find no information on the sites for either <a href="http://www.ntp.org/" rel="nofollow">NTP</a> or <a href="http://doc.ntp.org/4.1.0/ntpd.htm" rel="nofollow">NTPD</a>.</p>
  
  <p>For context, we run PHP/Apache/Solr/MySQL servers, and interact with third-party APIs that supply time-dependent responses, such as historical exchange rates or geolocations.</p>