BY ARIEL BOGLEAUSTRALIA
In case you need a little extra time this week, the last minute of Tuesday, June 30 will contain 61 seconds instead of the usual 60.
Atomic clocks around the world will coordinate the leap second, which is necessary to keep Coordinated Universal Time (UTC) — the system that guides most international civil times systems — synced with the Earth’s rotation.
On Tuesday, atomic clocks should read 23:59:59, then 23:59:60, before switching over to Wednesday with 00:00:00.
https://mashable.com/2015/06/29/tuesday-leap-second/?utm_cid=mash-com-Tw-main-link
