Fab story from the BBC News website (source) that reports that 23:59 will actually last for 61 seconds this year instead of the usual 60.
I am a little unsure of how why the BBC terms it ‘rare’ for this to happen though, as by my calculation, over the last 36 years, there have been 23 leap seconds added… therefore an average of one every 18 months!
It doesn’t, however, state whether the adjustment to Big Ben will be made during 23:59 or if they will silently make the change in the coming days. The article hints at 23:59 – I guess the person making the change would have to run quite quickly so as not to get caught out by the loud chimes!
I must admit, I was a little unsure how one would go about moving an analogue clock back by 1 second until I found out that it’s apparently it’s all to do with removing one of the old pennies that keeps the balance of Big Ben’s mechanism in synch and accurate.
Annoyingly, it does mean that all of our clocks and watches are going to be a second out until we eventually fall behind by enough of these ’seconds’ to be able to shift it forward a whole minute hehe! It’s never too seasonal for pedantry hehe! 
P
Either way, I am pleased that I won’t get caught out by mining along to Auld Lang Syne (I don’t know the words!) at the wrong time due to my awareness of the ‘leap second’! None of those embarassing delays where I’m just moving my lips around to nothingness and praying that everyone else is singing along to make it look like I am too! hehe!
Happy New Year to all! x
Extra second to keep UK on time
The timekeepers who look after Big Ben will have to adjust its clock
A “leap second” will be added onto official clocks around the world at midnight to account for the Earth’s slowing spin on its axis.
London’s Big Ben, whose bongs bring in the new year across the UK, will have its Great Clock adjusted.
And the BBC will add an extra “pip” to mark the delayed start to 2009.
Twenty-three leap seconds have been introduced since 1972 to keep GMT – internationally defined time – and the Earth’s rhythms in synch.
Revellers all over the UK will have an extra second to celebrate
Peter Whibberley, NPLTimekeepers at the National Physical Laboratory (NPL) will make sure Britain remains up-to-date by adding a second to the UK’s atomic clocks, kept at the NPL’s Teddington base in Middlesex.
While atomic time is extremely consistent, the Earth’s rotation – the traditional way of measuring time – varies unpredictably.
This is due to factors such as changes in the atmosphere and the molten core.
As a result, the two methods of measuring time slowly drift apart and leap seconds occasionally have to be added or subtracted to the atomic clocks to make sure astronomical and atomic time remain synchronised, and to ensure the Sun remains overhead at noon.
Peter Whibberley, senior research scientist in NPL’s Time Group, said atomic clocks like those at the laboratory are now “more than a million times more stable than the Earth’s rotation”.
“The difference between atomic time and Earth time has now built up to the point where it needs to be corrected, so this New Year’s Eve we will experience a rare 61 second minute at the very end of 2008 and revellers all over the UK will have an extra second to celebrate,” he said.
