That's how Google does that: http://googlecloudplatform.blogspot.com/2015/05/Got-a-second-A-leap-second-that-is-Be-ready-for-June-30th.html http://googlecloudpl

That's how Google does that: http://googlecloudplatform.blogspot.com/2015/05/Got-a-second-A-leap-second-that-is-Be-ready-for-June-30th.html http://googlecloudplatform.blogspot.com/2015/05/Got-a-second... . The drawback is that their clock will be "wrong" for most of that day.