John Sheriff, an investigator with the Royal Commission on the Ancient and Historic Monuments of Scotland, said it was impossible to date the stone precisely but it is very likely to be neolithic or Bronze Age, and could "easily" be 4, 000 years old.

BBC: Human remains found in Bronze Age pots

But the country's Nuclear Regulation Authority, which was created in response to the Fukushima disaster, has said meeting this date is "impossible" as new safety regulations won't be released until December.

WSJ: U.S. Opposes Japan's Nuclear Plan

When he talked to British Prime Minister Tony Blair after the decision on a date had been announced he denounced it as "impossible to accept".

BBC: Turks see silver lining in EU date

Mr Netanyahu said he had decided to pull the date forward because bickering among his coalition partners had made it impossible to pass a "responsible budget" for 2013.

BBC: Middle East

Mr. Ewing said there were no planned migrations for the SAT to a computerized format because it would be impossible to accommodate the average 3 million test takers on any given test date.

WSJ: SAT Scandal Shines Harsh Light on South Korean Academics

What I can tell you is that as we get closer to that date the Treasury Department will explain how it will manage a situation that is essentially an impossible situation.

WHITEHOUSE: Press Briefing