Midnight came later on Tuesday 30th June 2015 as for the first time in three years an extra second was added to the official time set by atomic clocks. The "leap second" means the last minute of June had 61 seconds in it. Leap seconds - and leap years - are added as basic ways to keep the clock in sync with the Earth and its seasons.

'Leap second' delays midnight

Midnight came later on Tuesday as for the first time in three years an extra second was added to the official time set by atomic clocks.

In the early hours of Sunday morning, clocks fall back an hour, marking the   end of British Summer Time. Here are five reasons why daylight savings time   should be adopted all year round.

5 reasons to stop turning the clocks back

In the early hours of Sunday morning, clocks spring forward an hour, marking the start of British Summer Time. Here are five reasons why the glorious institution of daylight savings time should be adopted all year round

Active Theory | Leap Second: On June 30 an extra second was added to the World Clock. This phenomenon is known as a leap second. Thousands of Android user submitted videos created a living picture of what the world did with their extra second.

On June 30 an extra second was added to the World Clock. This phenomenon is known as a leap second. Thousands of Android user submitted videos created.

Computer chaos feared over 2015's leap second - Reddit, Linkedin and other websites were hit by problems by the last leap second, in 2012.

Computer chaos feared over 2015's leap second

Studio Ceed shares:  This year's Y2K: 'Leap second' threatens to break the Internet

This year's Y2K: 'Leap second' threatens to break the Internet

'Leap second': Why June 30 will have one extra second http://www.latimes.com/science/sciencenow/la-sci-sn-june-30-leap-second-20150629-story.html

'Leap second': Why June 30 will have one extra second

'Leap second': Why June 30 will have one extra second http://www.latimes.com/science/sciencenow/la-sci-sn-june-30-leap-second-20150629-story.html

Leap Second’ Bug Wreaks Havoc Across Web

'Leap Second' Bug Wreaks Havoc Across Web

What Some of the Greatest Science Fiction Writers Thought 2012 Would Be Like

Leap Second added to clocks last week.

Saturday’s ‘Leap Second’ Added More Heat To This Weekend’s Tech Meltdowns

Leap Second added to clocks last week.

A leap second will be added to 2015 to keep atomic clock time in sync with Earth's actual rotational time.

2015's 'Leap Second' Could Scramble Computers

A minute on June 30 will have 61 seconds thanks to the leap second, a worldwide practice that adds a second to the world clock.

Tonight’s leap second may cause problems for the Internet

Tonight’s leap second may cause problems for the Internet

Due to the Earth's slowing rotation, we have to pause the clocks for a second.

BBC News - Leap second and storm disrupt weekend web services

Web suffers weekend of weakness

The decision on whether to abolish the leap second - the occasional, extra second added to the world's time - has been deferred to

The Leap Second Is About to Rattle the Internet. But There’s a Plot to Kill It

The Leap Second Is About to Rattle the Internet. But There's a Plot to Kill It

Earth takes on beautiful colors in this image created by a Russian weather satellite. The satellite, Elektro-L No.1, scans both visible and infrared wavelengths of light. Combining these images yields the colorful view of Earth seen above.

Sluggish Surprise Found Deep Inside Earth

This magnificent image is a portrait of the Earth taken in one single shot. At 121 megapixels, it is the highest resolution image of the planet ever and was taken by the geostationary Russian weather satellite the Electro-L.

What Is a Leap Second Anyway, and Why Do We Use It?

What Is a Leap Second Anyway, and Why Do We Use It?

The leap second adds one second to a day to keep the year and a second synced…

2008-12-31 23:59:60 UTC WWV Leap Second Insertion

WWV broadcast on MHz with the leap second inserted at UTC.

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